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.Management Sciences
Category: Physics Mcqs
Acceptor and donor impurities donate______________?
0
A. n-carriers only
B. p-carriers only
C. p-carriers and n-carriers respectively
D. n-carriers and p-carriers respectively
Pair production cannot take place in a vacuum as ________ is not conserved ?
A. Energy
B. Charge
C. Mass
D. MomentumB.
The performance of a refrigerator is described by________________?
A. efficiency
B. coefficient of performance
C. both A and B
D. not described
The number 76.85 is rounded off up to two significant figures as_____________?
A. 76.8
B. 77
C. 76.9
D. None of these
If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________?
A. π /3 x r
B. π/6 x r
C. V/30 x r
D. π / 180 x r
In normal state of energy the incident high energy photons will be______________?
A. Stimulated
B. Absorbed
C. Cause X-ray emission
D. Cause laser production
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