MCQ Questions

NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Uniform Circular Motion Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Uniform Circular Motion

1. The angular velocity of a body moving with a constant speed v in a circle of radius r is given by 
(a) v²/r
(b) vr
(c) v/r
(d) r/v

Answer

Answer: (c) v/r

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2. A cyclist turns around a curve at 15 miles/hour. If he turns at double the speed, the tendency to overturn is
(a) Doubled
(b) Quadrupled
(c) Halved
(d) Unchanged

Answer

Answer: (b) Quadrupled

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3. What will be the velocity vector of a particle moving in a circle describing equal angles in equal times
(a) Changes in direction
(b) Remains constant
(c) Changes in magnitude
(d) Changes both in direction and magnitude

Answer

Answer: (a) Changes in direction

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4. A body moves with a constant speed in a circular path is moving in a circular path with a constant speed. It has
(a) Acceleration of constant magnitude
(b) Constant velocity
(c) Constant acceleration
(d) An acceleration which varies with time

Answer

Answer: (a) Acceleration of constant magnitude

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5. A motorcyclist going with a constant speed in a circular track has 
(a) Linear velocity is constant
(b) Constant acceleration
(c) Angular velocity is constant
(d) Constant force

Answer

Answer: (c) Angular velocity is constant

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6. What could be the reason a car moving on a horizontal road gets thrown out of the road while taking a turn
(a) Due to the reaction of the ground
(b) Due to rolling frictional force between tyre and road
(c) By the gravitational force
(d) Due to lack of sufficient centripetal force

Answer

Answer: (d) Due to lack of sufficient centripetal force

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7. If a particle moves with constant angular velocity in a circle then during the motion its
(a) Momentum is conserved
(b) Energy is conserved
(c) Both energy and momentum is conserved
(d) None of the above is conserved

Answer

Answer: (b) Energy is conserved

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8. A stone tied to a string is rotated in a circle. If the string is cut, the stone flies away from the circle because
(a) A centrifugal force acts on the stone
(b) Of its inertia
(c) A centripetal force acts on the stone
(d) The reaction of the centripetal force

Answer

Answer: (b) Of its inertia

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9. A body moves with a constant speed along a circle. Then,
(a) No work is done on it
(b) There is no acceleration produced in the body
(c) No force acts on the body
(d) The body has constant velocity

Answer

Answer: (a) No work is done on it

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10. A tachometer is a device to measure
(a) Gravitational pull
(b) Speed of rotation
(c) Surface tension
(d) Tension in a spring

Answer

Answer: (b) Speed of rotation

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NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Non-uniform Circular Motion Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Non-uniform Circular Motion

1. A bottle of soap water is grasped by the neck and swings briskly in a vertical circle. Near which portion of the bottle do the bubbles collect
(a) Near the bottom
(b) In the middle of the bottle
(c) Near the neck
(d) Uniformly distributed in the bottle

Answer

Answer: (c) Near the neck

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2. A bucket tied at the end of a 1.6 m long spring is whirled in a vertical circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill when the bucket is at the highest position?
(a) 4 m/sec
(b) 6.25 m/sec
(c) 16 m/sec
(d) None of the above

Answer

Answer: (a) 4 m/sec

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3. A1 Kg stone at the end of 1 m long string is whirled in a vertical circle at a constant speed of 4 m/sec. The tension in the string is 6 N, when the stone is at
(a) Top of the circle
(b) Bottom of the circle
(c) Halfway down
(d) None of the above

Answer

Answer: (a) Top of the circle

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4. A cane filled with water is revolved in a vertical circle of radius 4 metres and the water just does not fall down. The time period of revolution will be
(a) 1 sec
(b) 10 sec
(c) 8 sec
(d) 4 sec

Answer

Answer: (d) 4 sec

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5. A 2 Kg stone at the end of a string 1 m long is whirled in a vertical circle at a constant speed. The speed of the stone is 4 m/sec. The tension in the string will be 52N, when the stone is
(a) At the top of the circle
(b) At the bottom of the circle
(c) Halfway down
(d) None of these

Answer

Answer: (b)At the bottom of the circle

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6. The string of pendulum of length l is displaced through 90⁰ from the vertical and released. Then the minimum strength of the string in order to withstand the tension, as the pendulum passes through the mean position is
(a) mg
(b) 3 mg
(c) 5 mg
(d) 6 mg

Answer

Answer: (b) 3 mg

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7. In a vertical circle of radius r, at what point in its path does a particle have tension equal to zero, if it is just able to complete the vertical circle
(a) Highest point
(b) Lowest point
(c) Any point
(d) At a point horizontally from the centre of the circle of radius r

Answer

Answer: (a) Highest point

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8. A hollow sphere has a radius of 6.4 m. Minimum velocity required by a motorcyclist at the bottom to complete the circle will be
(a) 17.7 m/s
(b) 10.2 m/s
(c) 12.4 m/s
(d) 16.0 m/s

Answer

Answer: (a) 17.7 m/s

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9. A fan is making 600 revolutions per minute. If after some time it makes 1200 revolutions per minute, then increase in its angular velocity
(a) 10 π rad /sec
(b) 20 π rad /sec
(c) 40 π rad /sec
(d) 60 π rad /sec

Answer

Answer: (b) 20 π rad /sec

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10. A stone tied with a string, is rotated in a vertical circle. The minimum speed with which the string has to be rotated
(a) Is independent of the mass of the stone
(b) Is independent of the length of the stone
(c) Decreases with increasing mass of the stone
(d) Decreases with increasing length of the stone

Answer

Answer: (a) Is independent of the mass of the stone

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NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Multiplication of Vectors Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Multiplication of Vectors

1. Two vectors \(2 \hat{i}+3 \hat{j}+8 \hat{k}\) and \(4 \hat{j}-4 \hat{j}+\alpha \hat{k}\) are perpendicular to each other. What is the value of α?
(a) ½
(b) -½
(c) 1
(d) -1

Answer

Answer: (b) -½

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2. A force of 50 N acts on a body and displaces it through a distance of 10 meters in a direction making an angle of 60⁰ with the force. What is the work done by the force?
(a) 100 J
(b) 150 J
(c) 200 J
(d) 250 J

Answer

Answer: (d) 250 J

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3. If the sum of two vectors is perpendicular to the difference between them. The ratio of their magnitude will be
(a) 1
(b) 2
(c) 3
(d) 4

Answer

Answer: (a) 1

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4. If \(\vec{A} \times \vec{B}=\vec{A} \cdot \vec{B}\)  then the angle between A and B will be
(a) π
(b) π/2
(c) π/3
(d) π/4

Answer

Answer: (d) π/4

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5. What is the value of \(|\vec{P} \times \vec{Q}| \text { if } \vec{P}=3 \hat{i}+\hat{j}+2 \hat{k} \text { and } \vec{Q}=2 \hat{i}-2 \hat{j}+4 \hat{k} \)?
(a) 8√3
(b) 3√8
(c) 4√3
(d) 3√4

Answer

Answer: (a) 8√3

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6. If \(\vec{P} \times \vec{Q}=\vec{R}\), then which of the following statements is true?

Answer

Answer: (d) \(\vec{R} \perp(\vec{P} \times \vec{Q})\)

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7. The magnitude of the scalar product of the vectors \(\overrightarrow{V_{1}}=2 \hat{i}+5 \hat{k}\) and \(\overrightarrow{V_{1}}=2 \hat{i}+5 \hat{k}\) is
(a) 20
(b) 36
(c) 24
(d) 34

Answer

Answer: (a) 20

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8. Which of the following statements is true if \(\vec{P}\)  and \(\vec{Q}\) are perpendicular to each other?

Answer

Answer: (c) \(\vec{P} \cdot \vec{Q}=0\)

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9. What is the angle between the vectors \(-2 \hat{i}+3 \hat{j}+\hat{k}\) and \(\hat{i}+2 \hat{j}+-4 \hat{k}\)?
(a) 0°
(b) 25°
(c) 90°
(d) 180°

Answer

Answer: (c) 90°

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10. A force \(\vec{F}=5 \hat{i}+6 \hat{i}+4 \hat{k}\) acts on a body and displaces it by \(\vec{S}=6 \hat{i}-5 \hat{\imath}\). What is the work done by the force?
(a) 5 Units
(b) 10 Units
(c) 15 Units
(d) 20 Units

Answer

Answer: (b) 10 Units

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11. What is the area of the parallelogram which represented by vectors \(\vec{P}=2 \hat{i}+3 \hat{j}\) and \(\vec{Q}=i+4 \hat{j}\)?
(a) 5 Units
(b) 10 Units
(c) 15 Units
(d) 20 Units

Answer

Answer: (a) 5 Units

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12. What is the angle between vectors \(\vec{A} \times \vec{B}\) and \(\vec{B} \times \vec{A}\)?
(a) π
(b) 0⁰
(c) π/2
(d) π/4

Answer

Answer: (a) π

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13. The angle between \(\vec{A}+\vec{B}\) and \(\vec{A} \times \vec{B}\) is
(a) π
(b) π/2
(c) π/4
(d) 0

Answer

Answer: (b) π/2

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14. The vectors \(\vec{a}\), \(\vec{b}\) and \(\vec{c}\) satisfy the relation \(\vec{a} \cdot \vec{b}=0\) and \(\vec{a} \cdot \vec{c}=0\). The vector \(\vec{a}\) is parallel to

Answer

Answer: (b)  \(\vec{b} \times \vec{c}\)

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