physics MCQs – Page 27

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 Review each marked answer and report any item that may be outdated or unclear.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
521. For ___________ flow the path of the fluid particles cannot be tracked?
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A. Laminar

B. Streamline

C. Turbulent

D. Both A and B

522. The effect of the decrease in pressure with the increase of the speed of the fluid in a horizontal pipe is known as______________?
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A. Bernoulli effect

B. Stokes effect

C. Torricelli effect

D. Venturi effect
523. Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________?
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A. 0.5

B. 1

C. 2

D. 0.2

524. One light year is equal to________________?
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A. 9.5x1015m

B. 9.5x1015Km

C. 9.5x1015cm

D. 9.5x1015sec

525. In cricket when a bowler produce reverse swing the ball will move towards______________?
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A. he shinning side of the ball

B. Goes straight

C. Rough side

D. The seam of the ball

526. Terminal velocity of the body is directly proportional to the_______________?
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A. Square of the diameter of the body

B. The radius of the body

C. The diameter of the body

D. Size of the body

527. If a diffraction grating is placed in the path of a light beam it reveals______________?
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A. Electromagnetic wave property

B. Wave property

C. Energy particle

D. Particle property

528. Irregular flow of fluid is called_______________?
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A. Uniform

B. Turbulent

C. Laminar

D. Streamline

529. The density of human blood is nearly equal to____________?
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A. Honey

B. Water

C. Mercury

D. Oil (kerosene)

530. Radiations are used for the treatment of skin of a patient is_______________?
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A. Gamma rays

B. X-rays

C. Beta rays

D. Alpha rays

531. hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?
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A. 180

B. 0

C. 90

D. 45

532. The critical speed of an artificial satellite is_______________?
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A. 8 ms-1

B. 8.1 Kms-1

C. 8 Kms-1

D. 7.9 Kms-1
533. Dioptre power of an concave lens of 10 cm focal length is_______________?
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A. 10 dioptre

B. 1 / 10 dioptre

C. 1 / 10 dioptre

D. 10 dioptre

534. Total number of series in hydrogen spectrum is_____________?
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A. five

B. four

C. three

D. six

535. Ratio of the weight of H-atom to that of an electron is approximately______________?
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A. 183.6

B. 1836

C. 18360

D. 18.336

536. Which of the following will be a better shield against gamma rays ?
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A. Aluminum

B. Heavy water

C. Ordinary water

D. Lead
537. The relation between linear and angular acceleration is______________?
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A. a = r x a

B. r = a x a

C. a = a x r

D. a = a x r

538. Which one of the following radiations has the strongest photon?
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A. Microwaves

B. ?-rays

C. T.V waves

D. X-rays

539. Michelson devised the formula to calculate the speed of light_______________?
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A. C = 8fd

B. C = 4fd

C. C = 5/2fd

D. C = 16fd
540. A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?
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A. 19.6 N

B. 39.2 N

C. 129.4 N

D. 9.8 N