Physics MCQs

852 MCQs  (Page 35 of 86)

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In any measurement the significant figures are______________?
A. All accurately known and all doubtful digits
B. Only accurately known digits
C. Only doubtful digits
D. All accurately known digits and the first doubtful digit
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A digit zero in a measurement__________________?
A. May be significant may not significant
B. Always significant
C. Always insignificant sign
D. Significant only if left to a significant figure
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The uncertainty in a measurement may occur due to_______________?
A. Limitation of an instrument
B. Natural variation of the object to be measured
C. Inadequate technique
D. All given in a, b and c
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Pair production cannot take place in a vacuum as ________________?
A. Mass is not conserved
B. Energy is not conserved
C. Momentum is not conserved
D. The chargee is not conserved
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Pair production can take place only with_________________?
A. X-rays
B. Gamma rays
C. Uv-rays
D. Ir-rays
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A device for producing high-velocity nuclei is ________________?
A. Cloud chamber
B. Linear accelerator
C. A mass spectrograph
D. Wilson cloud chamber
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Which of the following will be a better shield against gamma rays ?
A. Ordinary water
B. Heavy water
C. Lead
D. Aluminum
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The maximum safe limit dose for persons working in a nuclear power station is ________________?
A. 1 rem per week
B. 5 rem per week
C. 4 rem per week
D. 3 rem per week
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Radiations are used for the treatment of skin of a patient is_______________?
A. Alpha rays
B. Gamma rays
C. Beta rays
D. X-rays
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Which branch of science plays an important role in the development of technology and engineering ?
A. Chemistry
B. Physics
C. Geology
D. Biology
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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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