No Objection Letter Template, Format, Samples | How to write a No Objection Letter?

No Objection Letter is a document to permit you to leave the country and return back within the specified time period. It is also known as the No Objection Certificate(NOC). It is proof that you have obligations whether it is contractual or educational in your country where you have to return back.

NOC Letter confirms whichever country you are moving in with Visa you are allowed to stay until the visa gets expired. After the Expiration of your Visa, you aren’t allowed to overstay in the country. An Employee or Student is Permitted through NOC.

Access Letter Writing Topics of various kinds be them formal or informal all under one roof and get acquainted with different letter writing styles.

What is a No Objection Letter?

A No Objection Letter is a letter from your employer or your school/university which states that you don’t have contractual obligations. The No Objection Letter is otherwise known as a No Objection Certificate or a NOC. Even though it is optional, it is a good idea for you to submit it because it will speed up your process and increase your chances of approval.

Types of No Objection Letters

There are two types of NOC Letters depending on the status as an employee or student. They are as follows

  • NOC for employees
  • NOC for students

NOC Format for Employee is written by the Employer on behalf of the company. The NOC format for students is written by a responsible person from the university or college which the student attends.

No Objection Letter Format | NOC Structure

Go through the below modules to know what details must be included in a simple No Objection Certificate. They are along the lines

  • Date of writing the letter
  • Address
  • Name of employee/student
  • Name of supervisor/academic adviser
  • Address and contact information of supervisor/academic adviser
  • A paragraph stating that the company or university has no objections to the travel

When is a NOC Issued?

Since NOC is a legal document it is issued by an employer, employee, landlord, tenant, or individual. It can be used while

  • Making a trade
  • Or business of any kind
  • An offer

No Objection Certificate usually consists of basic details regarding both the parties involved, and it is addressed to whosoever is concerned.

No Objection Letter Samples

Sample No Object Letter for Tourist Visa

No Objection Letter for Tourist Visa

NOC Letter for Leaving Job

NOC Letter for Leaving Job

How to write a No Objection Letter?

Go through the below-listed guidelines on how to draft a No Objection Letter. They are along the lines

  • Address your letter to the concerned authority or individual. If you know the person whom you are writing include your full name on the salutation line.
  • Identify the subject of your letter and in the first para, you should include about whom you are writing the letter.
  • State the actions for which you have no objection. Based on what the individual wants you can grant additional permissions what they want.
  • Clarify your authority and relationship to the person.
  • Proofread your letter and date your letter on the day you sign it.

FAQs on No Objection Letter

1. What is a letter of no objection?

No objection letter is a document required to get a Visa from a company, school, or college that permits you to leave the country and return back within the specified time period.

2. What is the Format of No Objection Certificate?

Format of NOC is given as under

  • Date of writing the letter
  • Address
  • Name of employee/student
  • Name of supervisor/academic adviser
  • Address and contact information of supervisor/academic adviser
  • A paragraph stating that the company or university has no objections to the travel.

3. Where do I find No Objection Letter Format & Samples for free?

You can find No Objection Letter Samples for free on our page.

How To Write a Cover Letter? Writing Tips & Guidelines for Cover Letter Writing

how to write a cover letter

How To Write a Cover Letter: Formatting your cover letter is very crucial at the time of job trials because it is the first impact you’ll make on an employer. Indeed, how you structure your cover letter is essential as what you address in it. Generally, a cover letter is a formal one-page document that should be written by the applicant when applying for a job. Basically, it should be formatted correctly and in an understanding way to attract the employer and pay attention to your profile.

In this article, we have compiled information on cover letter formatting guidelines and more tips on how to format cover letters for a job. Apart from this, you even find the sample cover letter for your reference. So, go ahead and check out all modules for a better understanding of how to write a cover letter. For more Letter Writing Topics of both formal and informal, please visit our site and get familiar with different styles of letter writing.

What is a Cover Letter? (and Why It’s Important)

A cover letter is a single-page document that you should submit in the context of your job application (alongside your CV or Resume). Its objective is to introduce you and briefly summarize your professional background. A good cover letter can spark the HR manager’s interest and get them to read your resume. Overall, your cover letter (attached with your resume) benefits managers and recruiters screen your job application.

Also Check: 

How to Write the Perfect Cover Letter?

Now, we’re talking about the guide about the process of writing a cover letter step by step:

  1. Pick the Right Cover Letter Template
  2. Start the Cover Letter with a Header
  3. Greet the Hiring Manager
  4. Write an Attention-Grabbing Introduction
  5. Explain why you’re the perfect person for the job
  6. Explain why you’re a good fit for the company
  7. Wrap up with a call to action
  8. Use the right formal closing

Format for Writing a Perfect Cover Letter

You will see a well-structured format for every formal letter which are written in school, colleges, or in companies. For writing a resume or CV also you have to follow the format, in the same way, you have to learn what’s the format for a cover letter and how to write the cover letter perfectly.

An individual who is trying to get a new job must hold the knowledge of what to include in a cover letter and its format. Here are the details that should be included in the cover letter and the format of a cover letter:

  • Applicant’s Name and Contact Information
  • Recipient Name and Contact information
  • Job title you are applying for
  • A list of your skills as per the job title
  • A brief explaining why you are suitable for the job
  • Request them to contact you

format of cover letter

Cover Letter Sample

A sample cover letter is presented here in the image format for the job application. Candidates who are looking to write a cover letter for a new job requirement can check out the below sample as an example cover letter and write it on your own by including your skills and other capabilities. Also, by updating the details like name, address, employer’s name, and address, job title, etc.

cover letter sample

Essential Guidelines for Cover Letter Writing

  • Always sender should utilize a separate cover letter for each job.
  • It should also hold the job requirement and how you suit for it.
  • If you know the person to whom the letter is addressing then use Dear [name of the person] or else use the phrase “TO WHOMSOEVER IT MAY CONCERN”.
  • Do some research about the requirement and ask few questions related to that job if necessary.
  • The cover letter should always customize by collecting the information of the company as per the job. Once, go check out the company’s website before applying for it.
  • Do not encourage typos or any other mistakes in the letter.
  • Attach your CV or resume in the mail and do not include it in the cover letter.
  • Avoid using ‘I’ too much.
  • Apply for a single job with one letter despite the fact if there are several other openings.

FAQs on Writing a Cover Letter

1. What to include in your cover letter?

Below the list of things are needed to include in your cover letter:

  • Your name and contact details
  • Their name and contact details
  • The name of the job you’re going for
  • A list of your relevant skills
  • A summary of why you’re right for the job
  • Speak their language
  • Ask them to contact you

2. What not to include in your cover letter?

Here are some things that should never be in your cover letter:

  • Typos or mistakes
  • Including your whole resume in your cover letter
  • Using ‘I’ too much
  • Don’t mention your other job applications

3. What are the different types of Cover Letters?

Various Kinds of Cover Letters are as follows:

  • A cover letter when you have no work experience
  • cover letter when you have some work experience
  • A cover letter when no resume is needed
  • cover letter when there’s no job advertised.

 

 

Consent Letter Format & Samples | Tips and Guidelines to Write a Letter of Consent

consent letter format, templates, and samples

Consent Letter: A consent letter is a letter addressed to Request for Permission from a person or a group of people. If the respondent provides their consent, you must also be clear about the reason for which you are requesting consent. The data given via your consent form or consent letter can be used individually for its intended purpose. But, in the professional context, it appears as letters and forms. Browse on to grasp more extra regarding the various faces of consent letters and their corresponding advantages.

There are three distinct types of consent an organization may collect:

  • Explicit Consent: This type of consent is also known as direct consent
  • Implicit Consent: This type of consent is also known as indirect consent as it is described from the action of the respondents.
  • Opt-out Consent: Opt-out consent is another method of obtaining consent where organizations provide the choice to decline consent.

Furthermore, you can find more information about the Letter of consent in this article where you can learn thoroughly & quickly. Here, we have curated some guidelines for writing a consent letter, Letter of consent format, and samples for your reference. So, continue your read till to an end and write a letter of consent on your own.

Avail all types of Formal and Informal Letter Writing topics in one place and learn well with the help of different styles of letter writing.

Guidelines on How to Write A Letter of Consent

Have a look at these important guidelines and tips on how to write a Consent Letter and create an effective letter of consent on your own. The following are such tips & writing guidelines:

  • Make sure that the formal letter/ email has a clear heading about the consent.
  • Describe the specifications (if any) from the respondents.
  • Specify the duration of the program or participation.
  • Make sure that suitable names and other details like addresses and contact information of respective parties are included in the letter.
  • Explain the rules of engagement (or contract) of the project. Any benefits and/or compensation should precisely explain to the participants.
  • The most crucial part is the Signature on the consent letter. This is where the respondent accepts the consent.
  • Close the letter in a professional tone and proofread your consent letter.

LETTER OF CONSENT FORMAT

A Consent Letter Format is given here in a box style and also in image form. You guys can copy-paste the format if it matches your purpose of writing a letter of consent or else follow the format of the consent letter and draft it on your own:

Consent Letter Format

To Whom It May Concern,

I, the undersigned, [full name]……………………………………. agree that by signing this form I consent to the University of Leeds releasing information pertaining to my time of study to [addressee of the verification certificate] ………………………………………… . I understand that the verification issued by the university will include my full legal name at the time of the study, the level of degree undertaken, the full course title, the mode of attendance (i.e. full time or part-time), the start date, and award date and classification achieved (if applicable). If I was permanently withdrawn from my studies this will also be shown in the final document.

Signature:
Date:

consent letter format

CONSENT LETTER TEMPLATE

Letter of Consent Template

This is to certify that Mr. /Miss___________________________________________ is my son/ Daughter studying at Avantika University, Ujjain. He / She is in the course of B.Des / B.Tech / M.Des. We give our consent for any Medical / Surgical condition which can be life threatening for my child.

Sign of the Parent:-______________________
Name:-________________________________
Address: – _________________________________________________________________

Samples for Consent Letter

The following are the two most commonly used letter of consent:

Parental Consent Letter for Traveling – Sample 1

sample parental consent letter

Sample Consent Form for Credit Report Authorization

consent form sample

FAQs on Consent Letter Writing

1. Why Use An Online Consent Letter?

An online consent letter can be utilized for different reasons like generating leads, distributing surveys, collecting payments amongst others. The model consent form includes the personal data of clients also other key information.

2. What are the types of Consent letter?

Normally, you will find many types of consent letters, yet a majority of those letters are in accordance with these four types:

  • Parental consent form
  • Medical consent form
  • Consent form for research
  • Consent form for education

3. How to Write a Consent Letter easily & perfectly?

There are a few steps that should follow by the people while drafting the letter of consent are as follows:

  1. Review the Need for Permission
  2. Gather the Necessary Details
  3. Specify the Consent in Writing
  4. Allot a Specific Timeframe
  5. Authorize the Letter

Reference Letter Format, Samples, Template | Tips on How to write a Reference Letter?

Reference Letter

At Some Point or the Other, you might need to write a Reference Letter for your friend or employee you have worked with earlier. On the other hand, when you write a Reference Letter you need to know how to draft a Reference Letter, its Format, etc. Good Reference or Recommendation Letter can yield your Contact Achieve Your Dreams. Learn Tips for writing Recommendation Letters, Types of Reference Letters, Samples for your reference.

Get Letter Writing Topics for both formal and informal topics all in one place to have an idea of what and what not to include in your letter writings.

Types of Reference Letters

There are different types of reference letters and you can refer to them by checking the below modules.

  • Academic References
  • Employment References
  • Personal References
  • Professional References

Structure of Reference Letter | Reference Letter Format

A Good Reference or Recommendation Letter should include the following details. They are as under

  • Salutation
  • Body
  • Closing
  • Signature

Reference Letter Template

Reference Letter Template

How to Write a Reference Letter?

Follow the general guidelines listed below before drafting a Reference Letter on your own. The general guidelines to keep in mind while writing a Reference Letter is as follows

Salutation: Begin the Letter with Mr./Ms. if you don’t know the Employer’s Last Name. In the case of the general letter, you can write To Whom So Ever it may Concern or simply start with the first para.

First Paragraph: In the first para of the Reference Letter include details like your connection with the referring person and how you know them and why you are qualified to write a letter on their behalf etc.

Second Paragraph: Middle Paragraphs of the Letter should include details of the contact information of the person you are writing. Be Specific about why the person is a qualified candidate. Try to describe the qualities and skills of the specific person.

Letter Closing: In the Closing Para try to include more information and your contact information so that you can answer any further questions if necessary.

Signature: End the Letter with Signature Handwritten followed by your typed name.

Reference Letter Samples

Avail the Reference Letter Samples available for different types and learn how to write one on your own. You can simply refer to the entire reference letter examples provided and have an idea of what to include and what not to include. Use these Sample Letters to quickly different kinds of Reference Letters as per your interest.

Reference Letter Example

Reference Letter Sample

Reference Letter Sample

Reference Letter Sample

FAQs on Reference Letter

1. What is a Reference Letter?

Reference letters are usually positive endorsements of the skills and knowledge of an individual. These are generally written by a person who is familiar with an individual’s work.

2. Where do I get Reference Letter Samples?

You can get Reference Letter Samples for free of cost on our page.

3. Is there any website where I can find Recommendation Letter Template?

NCERTBooks.guru is a trusted portal where you can find Recommendation Letter Template.

Maths Formulas Important List | Basic Mathematics Formulae for CBSE Class 6 to 12

Maths Formulas

Maths can be difficult to grasp due to its vast collection of formulae. We have listed the Mathematical Formulas all in one place covering topics like calculus, algebra, geometry, and more. Avail the List of Math Formulas provided and understand the concepts behind them easily. Solve mathematical problems using the formulas prevailing and learn the fundamentals involved. You can rely on them as they are prepared by subject experts.

Try to learn the logic behind the formula rather than mugging up. This way you can remember them for a long time and solve your problems on a faster note. Use them as a quick reference during your preparation and try to score max. marks.

Important Maths Formulas for Classes 6, 7, 8, 9, 10, 11, 12

Students of Class 6 to 12 can make the most out of the maths formulae provided. Ace up your preparation with the formula collection and arrive at the solutions easily. Practicing the questions and answers based on the formulas you can remember for a long time. We have put considerable effort into creating the Important List Formulas as per the CBSE Guidelines.

Advantages of Maths Formulae

Have a glance at the benefits of referring to the Mathematical Formulas. They are in the following fashion

  • Students can have hands-on experience thereby improve the score.
  • Maths Formulas List provided helps students to finish the Syllabus in a smart way.
  • Give yourself time and find strengths and weaknesses.
  • Use the Mathematical Formulas provided as a quick reference during your preparation.
  • You can brush up your skills and seek help during your homework or assignments.

FAQs on Maths Formulas

1. Where do I get Maths Formulas Classwise?

You can get Maths Formulas Classwise on our page.

2. What is the best way to memorize Math Formulae?

The best way to memorize math formulae is through consistent practice. There is no shortcut other than practice to memorize the formula easily.

3. Where can I get all Important Formulas for Class 6 to Class 12?

You can get all Important Formulas for Class 6 to Class 12 altogether in detail on our page.

4. Which website offers the Basic Maths Formulas?

Ncertbooks.guru is a trusted portal where you can find the Basic Maths Formulas organized in an effective manner.

Final Words

We wish the information shared on our page regarding Maths Formulas has been helpful to you in clarifying your queries. For any other assistance feel free to reach us via comment section and we will get back to you at the soonest possibility. Bookmark our site Ncertbooks.guru for more information on Formulae.

NCERT Solutions for Class 12 Physics Chapter 6

NCERT Solutions for Class 12 Physics Chapter 6

NCERT Solutions for Class 12 Physics Chapter 6 Electromagnetic Induction is important for the students of CBSE, UP, MP, Gujarat Boards. NCERT physics class 12 chapter 6 Solutions PDF is presented here to aid students grasp the Electromagnetic Induction concepts in an interesting way. All Chapter 6 Electromagnetic Induction Exercise Questions and answers help 12th standard candidates to revise the entire syllabus & secure high.

You can rely on these NCERT Solutions to clear all your complex questions doubts and understand them clearly. All these solutions are answered by subject experts after doing thorough research. So, you can Download the Class 12 Physics NCERT Solutions Ch 6 Electromagnetic Induction PDF through quick links prevailing here without any hassle.

Class 12 Physics NCERT Solutions Chapter 6 Electromagnetic Induction

Firstly, you have to know about Electromagnetic Induction that means the production of an electromotive force across an electrical conductor. In Electromagnetic Induction Chapter, you will come to learn about some important & useful topics like electromotive force motions, magnetic flux, eddy currents, quantitative study on consideration of energy, and inductance.

Electromagnetic Induction also takes place in a changing magnetic field. Moreover, Fleming’s right-hand rule and Lenz’s law are also covered in this 12th class Physics chapter Electromagnetic Induction. So, practice more Numerical problems of Electromagnetic Induction chapter from NCERT Books & NCERT Solutions & score well in the examinations.

Class 12
Subject Physics
Book Physics
Chapter Number 6
Chapter Name Electromagnetic Induction

NCERT Solved Questions & Exercises for Class 12 Physics Chapter 6

Class 12 Physics NCERT Solved Questions & Exercises of Ch 6 will increase your subject knowledge by offering the strong basics on Electromagnetic Induction. All the answers provided for each question will raise your confidence to solve any questions in the actual examination. 12th Class NCERT Physics Solutions of Chapter 6 is a valuable resource for students during their homework & assignments too.

Question 1.
Predict the direction of induced current in the situations described by the following Fig. 2(a) to (f).
NCERT Solutions for Class 12 physics Chapter 6
NCERT Solutions for Class 12 physics Chapter 6.1
Answer:
(a) According to Lenz’s law south pole forms at q and north pole a to p. Therefore, induced current is from p to q.
(b) South pole develops at end q and at end x of the two coils as per Lenz’s law. Therefore, induced current is from q to p in coil PQ and x to y in coil
(c) The induced current should flow clockwise in the right loop (when seen from left) to oppose the current in the left loop. Hence, induced current flows along yzx
(d) When rheostat is adjusted to increase the current, magnetic flux through the neighbouring coil increases. As per Lenz’s law, induced current in the neighbouring coil should produce magnetic flux in opposite direction to oppose the original magnetic flux. Hence, induced current flows along
(e) When circuit breaks, magnetic flux decreases. The induced current should flow along xry to increase the magnetic flux.
(f) The magnetic flux threading the coil in the perpendicular direction is zero. Any change in current will not change this magnetic flux. Hence, no induced current is set up in the coil.

Question 2.
Use Lenz’s law to determine the direction of induced current in the situations described by Figure :
(a)
 A wire of irregular shape turning into a circular shape;
(b) A circular loop being deformed into a narrow straight wire.
NCERT Solutions for Class 12 physics Chapter 6.2
NCERT Solutions for Class 12 physics Chapter 6.3
Answer:
(a) The flux linked with the loop increases in this case so flux produced by the induced current should decrease it i.e. the direction of induced current should produce magnetic field in a direction outwards the plane of the paper. The direction of current as per right hand thumb rule comes out to be along adcba. (i.e. anti­clockwise)

(b) In this case, the flux linked with the loop is decreasing so the direction of induced current is anticlockwise so as to oppose the decrease in flux. Thus, direction of induced current is along a’d’c’b’.

Question 3.
A long solenoid with 15 turns per cm has a small loop of area 2.0 cm2 placed inside the solenoid normal to its axis. If the current carried by the solenoid changes steadily from 2.0 A to 4.0 A in 0.1s, what is the induced e.m.f. in the loop while the current is
changing ?
Answer:
byjus class 12 physics Chapter 6.4

Question 4.

A rectangular wire loop of sides 8 cm and 2 cm with a small cut ¡s moving out of a region of uniform magnetic field of magnitude O.3 T directed normal to the mop. What ¡s the e.m.f. developed across the cut if the velocity of the loop is 1 cm s-2 in a direction normal to the (a) longer side,
(b) shorter side of the loop ? For how long does the induced voltage last in each case ?
Answer:
e = B
NCERT Solutions for Class 12 physics Chapter 6.5
Question 5.
A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s_1 about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic Field of 0.5 T parallel to the axis exists everywhere. Calculate the e.m.f. developed between the center and the ring.
Answer:
NCERT Solutions for Class 12 physics Chapter 6.6
Question 6.
A circular coil of radius 8.0 cm and 20 turns rotates about its vertical diameter with an angular speed of 500 rad s_1 a uniform horizontal magentic field of magnitude 3.0 x 10-2 T. Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance 10 Ω, calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating. Where does this power come from ?
Answer:
byjus class 12 physics Chapter 6.7
(v) Source of power loss is the external rotor which provides the necessary torque to rotate the coil.

Question 7.
A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 ms-1, at right angles to the horizontal component of the earth’s magnetic field,
0.30 x 10-4 Wb m-2.
(a) What is the instantaneous value of the e.m.f. induced in the wire ?
(b) What is the direction of the e.m.f. ?
(c) Which end of the wire is at the higher electrical potential ?
Answer:
NCERT Solutions for Class 12 physics Chapter 6.8
(b) Using Fleming’s Right hand rule, the direction of induced e.m.f. is from West to East.
(c) Since the rod will act as a source, the Western end will be at higher electrical potential.

Question 8.
Current in a circuit falls from 5.0 A to 0.0 As. If an average emf of 200 V is induced, give an estimate of the self-inductance of the circuit.
Answer:
NCERT Solutions for Class 12 physics Chapter 6.9

byjus class 12 physics Chapter 6.10
Question 9.

A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil ?
Answer:
Using dΦ = Mdl, we get
dΦ= 1.5 X (20 – 0) = 30 Wb

Question 10.
A jet plane is travelling towards west at a speed of 1800 km/h. What is the voltage difference developed between the ends of the wing having a span of 25 m, if the Earth’s
magnetic field at the location has a magnitude of 5 x 10-4 T and the dip angle is 30°? Answer:
NCERT Solutions for Class 12 physics Chapter 6.12

Question 11.
Suppose the loop in Exercise 6.4 is stationary but the current feeding the electromagnet
that produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T s-1. If the cut is joined and the loop has a resistance of 1.6 Ω, how much power is dissipated by the loop as heat ? What is the source of this power ?
Answer:
NCERT Solutions for Class 12 physics Chapter 6.13
Source of this power is the external agency which brings change in magnetic field.

Question 12.
A square loop of side 12 cm with its sides parallel to X and Y axes is moved with a velocity of 8 cm s_1 in the positive x-direction in an environment containing a magnetic field in the positive z-direction. The field is neither uniform in space nor constant in time. It has a gradient of 10-3 T cm-1 along the negative x- direction (that is it increases by
10-3 T cm-1 as one moves in the negative x-direction), and it is decreasing in time at the rate of 10-3 T s_1. Determine the direction and magnitude of the induced current in the loop if its resistance is 4.50 mΩ.
Answer:
byjus class 12 physics Chapter 6.14
NCERT Solutions for Class 12 physics Chapter 6.15
Direction of induced current is such that it increase the magnetic flux linking with the loop in positive 2-direction.

Question 13.
It is desired to measure the magnitude of field between the poles of a powerful loud speaker magnet. A small flat search coil of area 2 cm2 with 25 closely wound turns, is positioned normal to the field direction, and then quickly snatched out of the field region. Equivalently, one can give it a quick 90° turn to bring its plane parallel to the field direction. The total charge flown in the coil (measured by a ballistic galvanometer connected to coil) is 7.5 mC. The combined resistance of the coil and the galvanometer is 0.50 Ω. Estimate the field strength of magnet.
Answer:
NCERT Solutions for Class 12 physics Chapter 6.16
Question 14.
Figure shows a metal rod PQ resting on the rails AB and positioned between the poles of a permanent magnet. The rails, the rod, and the magnetic field are in three mutual perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0 mΩ. Assume the field to be uniform.
NCERT Solutions for Class 12 physics Chapter 6.17
(a) Suppose K is open and the rod is moved with a speed of 12 cm s-1 in the direction shown. Give the polarity and magnitude of the induced emf.
(b) Is there an excess charge built up at the ends of the rods when K is open ? What if K is closed ?
(c) With K open and the rod moving uniformly, there is no net force on the electrons in the rod PQ even though they do experience magnetic force due to the motion of the rod. Explain.
(d) What is the retarding force on the rod when K is closed ?
(e) How much power is required (by an external agent) to keep the rod moving at the same speed (= 12 cm s_1) when K is closed ? How much power is required when K is open ?
(f) How much power is dissipated as heat in the closed circuit ? What is the source of this power ?
(g) What is the induced emf in the moving rod if the magnetic field is parallel to the rails instead of being perpendicular ?
Answer:
(a) Using e = Bυl, we get
e = 0.5 x 12 x 10.2 x 15 x 102
= 9 x 10-3 V
The electrons in the rod will experience force along PQ, so end P becomes positive and Q becomes negative.
(b) On closing the key K, the number of electrons become more at end Q. Therefore, excess charge is maintained by the continuous current.
(c) Magnetic force gets cancelled by electric force due to excess charges of opposite sign at the ends of the rod.
(d) Retarding force, F = BIl =B eR l
byjus class 12 physics Chapter 6.18

Question 15.
An air-cored solenoid with length 30 cm, area of cross-section 25 cm2 and number of turns 500, carries a current of 2.5 A. The current is suddenly switched off in a brief time of 10-3 s. How much is the average back emf induced across the ends of the open switch in the circuit ? Ignore the variation in magnetic field near the ends of the solenoid.
Answer:
NCERT Solutions for Class 12 physics Chapter 6.28

Question 16.
(a) Obtain an expression for the mutual inductance between a long straight wire and a square loop of side a as shown in Figure
NCERT Solutions for Class 12 physics Chapter 6.29
(b) Now assume that the straight wire carries a current of 50 A and the loop is moved to the right with a constant velocity, υ = 10 m/s. Calculate the induced e.m.f. in the loop at the instant when x = 0.2 m. Take a = 0.1 m and assume that the loop has a large resistance.
Answer:
(a) Consider a small portion of the coil of thickness dt at a distance t from the current carrying wire.Then the magnetic field strength experienced by this portion
NCERT Solutions for Class 12 physics Chapter 6.30

NCERT Solutions for Class 12 physics Chapter 6.31NCERT Solutions for Class 12 physics Chapter 6.32

Question 17.

A line charge X per unit length is lodged uniformly onto the rim of a wheel of mass M and radius R. The wheel has light non-conducting spokes and is free to rotate without friction about its axis (Figure.) A uniform magnetic field extends over a circular region within the rim. It is given by
byjus class 12 physics Chapter 6.24
What is the angular velocity of the wheel after the field is suddenly switched off ?
NCERT Solutions for Class 12 physics Chapter 6.25
Answer:
Change in magnetic field is given by,
NCERT Solutions for Class 12 physics Chapter 6.26
NCERT Solutions for Class 12 physics Chapter 6.27

So, Download 12th Class Physics NCERT Exercise Questions with Solutions of Chapter 6 Electromagnetic Induction PDF and kickstart your exam preparation. For your convenience, we have tried to list out the NCERT Solutions for Class 12 Physics Chapter 6 Electromagnetic Induction in Hindi & English Mediums. Brainstorm Important Questions, Formulae, Notes, Exemplar Problems concerning the Class 12 Physics Electromagnetic Induction NCERT Solutions PDF.

Final Words

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