physics MCQs – Page 25

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 Review each marked answer and report any item that may be outdated or unclear.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

481. Geostationary satellite completes one rotation around the earth in_______________?
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A. 3 hours

B. 6 hours

C. 12 hours

D. 24 hours

482. Speed of efflux can be determined by applying______________?
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A. Torricellis theorem

B. Bernoullis theorem

C. Venture relation

D. All

483. The direction of the linear velocity of a body moving in a circle is______________?
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A. directed away from the centre

B. along the axis of rotation

C. along the tangent

D. directed towards the centre

484. In multiplication and division of measurement______________?
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A. Percentage uncertainties are divided

B. Absolute uncertainties are divided

C. Percentage uncertainties are added

D. Absolute uncertainties are added

485. Stopping potential for a metal surface in case of photoelectric emission depends on_____________?
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A. all of the above

B. the intensity of incident light

C. the frequency of incident light and work function of the metal surface

D. the threshold frequency for the metal surface

486. Pair production can take place only with_________________?
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A. IR-rays

B. UV-rays

C. Gamma rays

D. X-rays

487. Terminal velocity is given by equation_______________?
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A. Vt = gr2?

B. Vt = gr2/9?

C. Vt = 2gr2/9?

D. Vt = 9gr2/2?

488. The flow of ideal fluid is always_______________?
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A. Turbulent

B. Streamline

C. Irregular

D. Straight line

489. A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?
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A. 4?R

B. 2? R

C. 0

D. ?R

490. When K.E energy of SHM is maximum its__________________?
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A. Acceleration is zero

B. P.E is zero

C. All P.E acceleration and restoring force are zero

D. Restoring force is zero

491. For a simple pendulu,m the restoring force is caused by________________?
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A. Spring

B. Hand

C. Gravity

D. All of these

492. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?
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A. Becomes double

B. Becomes half

C. First increases then decrease because of the curvilinear graph

D. Remains same

493. Magnification of the astronomical telescope is_____________?
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A. fe/fo

B. fo+fe

C. (1+fo/fe)L/fo

D. fo/fe

494. Magnifying power of simple microscope______________?
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A. increase with decrease in focal length

B. list distance of distinct vision

C. increase with increase in focal length

D. no effect with decrease or increase with focal length

495. When fluid is incompressible then________________?
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A. The density of the fluid is constant

B. The velocity of the fluid is constant

C. The volume of the fluid is constant

D. The flow of the fluid is the straight line

496. Centripetal force performs_______________?
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A. Negative work

B. Minimum work

C. No work

D. Maximum work

497. Prefix deca represents_______________?
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A. 10 Raised to power 3

B. 10 Raised to power 2

C. 10 Raised to power 1

D. 10 Raised to power -1

498. In case of planets the necessary acceleration is provided by______________?
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A. Centripetal force

B. Gravitational force

C. Frictional force

D. Coulomb force

499. For normal adjustment, length of astronomical telescope is______________?
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A. fo + fe

B. fo / fe

C. fe / fo

D. fo fe

500. The rotational K.E of the hoop is equal to the______________?
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A. double than its translational K.E

B. half than its translational K.E

C. its translational K.E

D. four times than its translational K.E

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