physics MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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
601. 1024 can be written in scientific notation as______________?
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A. 1.024103

B. 2 Raised to power 10

C. 0.000976

D. 1/0.00097

602. Bernoullis equation is applicable for_________________?
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A. Laminar flow

B. Turbulent flow

C. Both laminar and turbulent flow

D. None of these

603. The power of a concave lens is_______________?
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A. real

B. positive

C. negative

D. virtual

604. If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?
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A. 2.8 ms-1

B. 1.6 rad. S-1

C. 4 rad. S-1

D. 5 rad. S-1
605. Compton effect proves the________________?
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A. Uncertain nature of light

B. Photon theory of light

C. Wave nature of light

D. Dual nature of light

606. In Davisson-Germer experiment the diffracted proton from crystal shows______________?
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A. Light property

B. Quantum property

C. Wave property

D. Particle property

607. As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?
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A. shifts towards shorter wavelength

B. remain the same

C. shifts towards longer as well as shorter wavelengths

D. shifts towards longer wavelength

608. The profile of aeroplane wing which lifts it up is called as_____________?
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A. Curved profile

B. Wing shape

C. None of these

D. Aerofoil profile
609. In case of a simple pendulum, the cause of damping is__________________?
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A. Drag force of air

B. None of these

C. Tension in the string

D. Gravity

610. A convex lens acts as a diverging lens if the_________________?
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A. object is beyond C

B. if the object is with in C

C. if the object is within f

D. both B and C
611. How many main frontiers of fundamental science ?
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A. 1

B. 3

C. 4

D. 2

612. A simple pendulum suspended from the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is_________________?
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A. T/g

B. g/T

C. Zero

D. Infinite
613. A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?
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A. mg + ma

B. mg ma

C. mg

D. mg ma

614. The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?
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A. Ke2/rn2

B. Ke2/rn

C. Ke2/rn

D. Ke2/rn2

615. Least distance of distinct vision_____________?
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A. neither increases nor decreases

B. becomes infinite after 60 years

C. decreases with increase in age

D. increases with increase in age
616. A three-dimensional image is obtained by________________?
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A. Electron microscope

B. Scanning electron microscope

C. Magnetic imaging

D. None of the above

617. When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?
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A. mV2/r

B. mV/r

C. mV2/r2

D. mV/r2

618. The uncertainty in momentum & position is due to its_____________?
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A. Emission of the certain wavelength

B. Property of matter and radiation

C. Very high velocity

D. Two-dimensional motion

619. Two fog droplets have radius 2:3 their terminal velocities are_______________?
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A. 4.3

B. 4:06

C. 2:09

D. 4:09
620. Systolic pressure is called_______________?
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A. High blood pressure

B. Low blood pressure

C. Normal blood pressure

D. Abnormal blood pressure