Physics MCQs

852 MCQs  (Page 18 of 86)

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The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?
A. Karl-weins law
B. Rayleigh-jeans law
C. Stephens law
D. Plancks
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Compton effect proves the________________?
A. Photon theory of light
B. Dual nature of light
C. Wave nature of light
D. Uncertain nature of light
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Electron moves in the orbit as________________?
A. Simple vibratory motion
B. Standing wave motion
C. Vibratory motion like up and down
D. S.h.m likes the sound
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A lens which converges a beam of parallel rays to a point is called______________?
A. Diverging (or concave) lens
B. Converging (or convex) lens
C. Plano concave lens
D. Plano convex lens
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The diameter of a lens is called________________?
A. Focal length
B. Principal axis
C. Aperture
D. Radius of curvature
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Unit of power of a lens is________________?
A. Meter
B. Watt
C. Diopter
D. Horsepower
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The power of a concave lens is_______________?
A. Real
B. Virtual
C. Positive
D. Negative
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If a material object moves with speed of light its mass becomes ________________?
A. Equal to its rest mass
B. Double of its rest mass
C. Infinite
D. Zero
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Rest mass of a photon is________________?
A. Infinite
B. Zero
C. Very small
D. 1.67 x 10-27 kg
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Einstein’s photoelectric equation is given by_______________?
A. 1/2 mvmax2=hf+φ
B. 1/2 mvmax2-hf = φ
C. 1/2 mvmax2=hf-φ
D. All of above are correct
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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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