Physics MCQs

852 MCQs  (Page 61 of 86)

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Diffraction fringes are____________________?
A. Equally spaced
B. Distance between them increases
C. Distance between then decreases
D. They are adjacent with no space in between
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A thing that emits its own light is___________________?
A. Luminous
B. Non-luminous
C. Incandescent
D. Bright
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Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
A. Newton
B. Einstein
C. Michelson
D. Galileo
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Which experiment shows that wavelength of light is smaller than that of sound___________________?
A. Diffraction
B. Polarization
C. Interference
D. Reflection
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When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?
A. Zero
B. Minimum
C. Infinity
D. Maximum
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If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?
A. 38.2 j
B. 392.1 j
C. 39.2 j
D. 3.92 j
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The average power and instantaneous power become equal if work is done at __________________?
A. Any rate
B. At variable rate
C. At uniform rate
D. At high rate
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Two sources of light are coherent if they emit rays of_______________?
A. Same wavelength
B. Same amplitude of vibration
C. Same wave length with constant phase difference
D. Same amplitude and wavelength
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The velocity of light was determined accurately by_______________?
A. Newton
B. Michelson
C. Huygen
D. Young
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appearance of colour in thin films is due to ____________________?
A. Diffraction
B. Dispersion
C. Interference
D. Polarization
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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