physics MCQs – Page 24

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 Review each marked answer and report any item that may be outdated or unclear.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
461. Random errors can be reduced by_______________?
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A. Taking mean of several measurements

B. Taking zero correction

C. All methods explained in A, B and C

D. Comparing the instrument with another more accurate one

462. Radiation with wavelength longer than red lights______________?
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A. infra red radiation

B. X-rays

C. ultraviolet rays

D. visible radiation

463. Terminal velocity is_____________?
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A. Uniform

B. Neither uniform nor maximum

C. Maximum

D. Uniform and maximum
464. The diameter of a lens is called________________?
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A. radius of curvature

B. principal axis

C. focal length

D. aperture

465. Which one does not work according to resonance ?
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A. Radio

B. T.V

C. Bulb

D. Microwave oven

466. Rest mass of a photon is________________?
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A. very small

B. 1.67 x 10-27 kg

C. infinite

D. zero
467. The number of categories in which physical quantities are divided is_____________?
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A. 3

B. 1

C. 2

D. 4

468. An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?
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A. less than one meter

B. one meter

C. a foolish question

D. greater than one meter

469. If a wheel of radius r turns through an angle of 30 then the distance through which any point on its rim moves is______________?
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A. V/30 x r

B. ? / 180 x r

C. ? /3 x r

D. ?/6 x r
470. If a photon is reflected from the mirror then the change in momentum of each photon is_______________?
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A. Zero

B. Half

C. 1

D. Double
471. The planet nearest to the earth is______________?
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A. Sun

B. Uranus

C. Mercury

D. Venus
472. A transmitting station emits radio waves of wavelength ? at power P. If h is Plancks constant & c the speed of light what is the rate of emission of photons ?
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A. ?

B. Speed of sound

C. h

D. Speed of lightB.
473. If a body of mass 10 kg is allowed to fall freely, its weight becomes______________?
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A. 0

B. 89N

C. 9.8 N

D. 10N

474. The restoring force acting on the simple pendulum is given by_______________?
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A. mg sin ?

B. mg sin ?

C. mg cos ?

D. mg cos ?

475. Sphygmomanometers measures blood pressure ?
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A. Statically

B. None of these

C. Some time static and sometimes dynamic

D. Dynamically
476. The name of the photon for quantum of light was proposed by________________?
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A. Ampere

B. Einstein

C. Plank

D. Thomson

477. Electron moves in the orbit as________________?
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A. S.H.M likes the sound

B. Vibratory motion like up and down

C. Simple vibratory motion

D. Standing wave motion
478. Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?
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A. 0

B. 2?R

C. ?R

D. 4?R

479. The function of collimeter in spectrometer is________________?
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A. to produce parallel beams of light

B. no function

C. to filter the light rays

D. to make them

480. Which one is the correct representation of the unit of pressure ?
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A. Newton/meter2

B. Newton/Meter2

C. newton/meter2

D. newton/Meter2