physics MCQs – Page 10

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs

181. The tides raise the mater in the see roughly in a day___________________?
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A. four time

B. twice

C. eight time

D. once

182. The magnitude of i^. (j^ x k^) is________________?
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A. 0

B. i^

C. 1

D. -1

183. If A=B, which of the following is not correct ?
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A. |A| = |B|

B. A.B = A^ B^

C. AB^ = BA^

D. |A^| = |B^|

184. The work done by friction is__________________?
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A. zero

B. none of these

C. negative

D. positive

185. In the nucleus of uranium, the number of neutrons will be _____________?
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A. 143

B. Different for different isotopes

C. 92

D. 235

186. A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
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A. man does more work than child

B. child does more work than man

C. both do the same amount of work

D. it is a foolish question

187. A ferromagnet will become fully magnetized at_________________?
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A. D.C current at peak value

B. High voltage A.C

C. Low voltage A.C

D. Alternating current at its peak value

188. Average energy required to remove one nucleon from the nucleus is called__________________?
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A. All of above

B. Binding energy per nucleon

C. Energy of decay

D. Destruction energy

189. Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________?
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A. Stiffness

B. Toughness

C. Extension

D. Deformation

190. If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?
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A. 38.2 J

B. 3.92 J

C. 39.2 J

D. 392.1 J

191. It is easier to turn a steering wheel with both hands than with a single hand because______________?
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A. The couple acts on the wheel

B. Accelerating force increases on the wheel

C. Two forces act on the wheel

D. Two hands provide a firm grip

192. Formation of large molecule by joining small molecules is_________________?
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A. Crystallization

B. Subtraction

C. Polymerization

D. Fusion

193. Very weak magnetic fields are detected by___________________?
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A. Magnetometer

B. Squids

C. Magnetic resonance imaging (MRI)

D. Oscilloscope

194. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?
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A. The cross sectional area of the wire remains constant

B. The wire is not stretched beyond its elastic limit

C. The weight of the wire is negligible

D. The extension of the wire is proportional to the force applied

195. An ammeter measures the total current flowing through a circuit when it is connected__________________?
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A. in series with the circuit

B. in parallel with any of the series resistances in the circuit

C. in series with any of the parallel resistances in the circuit

D. in parallel with circuit

196. The charge on beta particle is________________?
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A. 2

B. -1

C. 1

D. -2

197. During the fission process a large amount of______________?
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A. Heat energy is released

B. Chemical energy is released

C. Nuclear energy is released

D. Light energy is released

198. Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?
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A. ?-rays

B. ?-rays

C. X-rays

D. ?-rays

199. The charge on neutron is_______________?
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A. No definite charge

B. Zero

C. Plus 1.6 x 10-19C

D. Minus 1.6 x 10-19C

200. The frequency of a circuit consisting of a capacitance C and a resistor R is________________?
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A. 1/RC

B. C/R

C. 1/ 2RC

D. R/C

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