Physics MCQs

852 MCQs  (Page 14 of 86)

Attempt Physics Quiz
X-rays are similar in nature to_______________?
A. Cathode rays
B. Positive rays
C. Γ-rays
D. Beta rays
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When X-rays are passed through successive aluminum sheets what happens to their thickness ?
A. Increases
B. It decreases
C. It remains same
D. Sometimes increases and sometimes decreases
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The value of critical angle for glass is_______________?
A. 42°
B. 47°
C. 52°
D. 50°
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In optic fiber transmission system _____________ are used regenerate the dim light signal?
A. Diodes
B. Repeaters
C. Laser
D. Transformer
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Magnification of the astronomical telescope is_____________?
A. Fo+fe
B. Fo/fe
C. Fe/fo
D. (1+fo/fe)l/fo
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Errors in the transmission of power through optic fiber can be minimized by using a______________?
A. Multimode index fiber
B. Graded index fiber
C. Single mode step index fiber
D. Copper wire
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The function of collimeter in spectrometer is________________?
A. To produce parallel beams of light
B. To filter the light rays
C. To make them
D. No function
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In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?
A. 300km
B. 200km
C. 100km
D. 20km
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Michelson devised the formula to calculate the speed of light_______________?
A. C = 4fd
B. C = 8fd
C. C = 16fd
D. C = 5/2fd
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A convex lens acts as a diverging lens if the_________________?
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
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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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