# MCQ on Cyclotron for NEET 2020

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 Moving Coil Galvanometer Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

## MCQ on Moving Coil Galvanometer

1. The angular frequency of a cyclotron is independent of
(a) Speed
(b) Mass
(c) Magnetic field
(d) Charge

2. The maximum kinetic energy of the positive ion in the cyclotron is
(a) qBR2/2m
(b) q2B2R2/2m
(c) q2B2R2/m
(d) qBR/m

3. Cyclotron cannot accelerate
(a) Electrons
(b) Neutrons
(c) Positive ions
(d) (Both (1) and (2)

Answer: (d) Both (1) and (2)

4. The cyclotron frequency of an electron grating in a magnetic field of 1 T is approximately
(a) 28 MHz
(b) 280 MHz
(c) 2.8 GHz
(d) 28 GHz

5. Suppose a cyclotron is operated at an oscillator frequency of 12 MHz and a dee radius of 53cm. What is the resulting kinetic energy of the deuterons?
(a) 16.6 MeV
(b) 12 MeV
(c) 15 MeV
(d) 14 MeV

6. An alternating electric field of frequency f is applied across the dees (radius = R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton, produced by it, are given by
(a) B = mf/e and K= 2mπ2v2R2
(b) B =2πmf/e and K= m2πvR2
(c) B =2πmf/e and K= 2mπ2v2R
(d) B = mf/e and K= m2πvR2

Answer: (c) B =2πmf/e and K= 2mπ2v2R

7. The energy of emergent protons in MeV from a cyclotron having a radius of its dees 2 m and applied magnetic field 0.8 T is (mass of proton = 1.67 x 10-27 kg).
(a) 0.961 x 10-11 J
(b) 1.22 x 10-11 J
(c) 1.5 x 10-12 J
(d) 12 x 10-11 J

Answer: (a) 0.961 x 10-11 J

8. Cyclotron can be used in
(a) Particle therapy to treat cancer
(b) Source of high energy beam for a nuclear physics experiment
(c) Produce short-lived positron-emitting isotopes for PET imaging
(d) All the above

9. A proton of energy 100 eV is moving perpendicular to a magnetic field 10-4 T. The cyclotron frequency of the proton in radian/sec
(a) 2.80 x 106
(b) 9.6 x 103
(c) 5.6 x 106
(d) 1.76 x 106