physics MCQs – Page 30

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 Review each marked answer and report any item that may be outdated or unclear.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
581. Bernoullis equation is obtained by applying the law of conservation of ________________?
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A. Momentum

B. Energy

C. Mass

D. Fluid

582. Errors in the transmission of power through optic fiber can be minimized by using a______________?
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A. Copper wire

B. Multimode index fiber

C. Graded index fiber

D. Single mode step index fiber

583. ML-1 T-2 is the dimension of_______________?
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A. Pressure

B. Force

C. Energy

D. Momentum

584. 0.001 kg mass will be equivalent to_________________?
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A. 25.00 GWh

B. 250 GWh

C. 0.26 GWh

D. 2.50 GWh

585. The energy absorbed by a body is __________________ at resonance?
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A. Maximum as well minimum

B. Maximum only

C. 0

D. Minimum only

586. The relativistic energy E is equivalent to relativistic mass given by_______________?
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A. E/c2

B. E/c

C. c2/E

D. Ec2

587. In any measurement the significant figures are______________?
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A. All accurately known and all doubtful digits

B. Only doubtful digits

C. All accurately known digits and the first doubtful digit

D. Only accurately known digits

588. According to Einstein, the gravitational interaction is possible between_______________?
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A. electromagnetic radiations

B. material objects only

C. material objects and electromagnetic radiation only

D. none of the above

589. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?
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A. focus

B. aperture

C. center of curvature

D. optical center

590. The waveform of S.H.M. is________________?
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A. Square wave

B. Sine wave

C. None

D. Standing wave

591. A chimney works best if air exposed to the chimney is______________?
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A. Stationary

B. Moving fast

C. Moving

D. Moving slowly

592. When the amplitude of a wave becomes double its energy become_________________?
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A. None time

B. Double

C. Four times

D. One half

593. The dimensions of the coefficient of viscosity are_____________?
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A. ML-1T-1

B. M2L1T1

C. ML1T-1

D. M2L-1T-1

594. The acceleration of a projection on the diameter for a particle moving along a circle is_______________?
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A. wx2

B. wx2

C. w2x

D. w2x
595. The force responsible for the vibratory motion of the simple pendulum is_________________?
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A. mg ton?

B. mg

C. mg cos?

D. mg sin?
596. If the length of the second pendulum becomes four times, then its time period will become________________?
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A. 2 times

B. 8 times

C. 4 times

D. 6 times

597. A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?
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A. K.E hoop = 2K.E disc

B. K.E hoop = 4K.E disc

C. K.E hoop = 1/2K.E disc

D. K.E hoop = K.E disc

598. When the body moves with terminal velocity the acceleration in the body become_____________?
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A. 0

B. Variable

C. Infinite

D. Maximum

599. A device for producing high-velocity nuclei is ________________?
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A. Wilson cloud chamber

B. A mass spectrograph

C. Linear accelerator

D. Cloud chamber

600. In obtaining an X-ray photograph of our hand we use the principle of______________?
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A. any of above

B. shadow photograph

C. photo electric effect

D. ionization