Physics MCQS with Answers Set 1

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Physics MCQS with Answers


The henry is the unit for
Magnetic field
Magnetic flux
Resistance
Inductance

Two sources of sound are said to be coherent if
They produce sounds of equal intensity
They produce sound waves with zero or constant phase different all instant of time
They produce sounds of equal frequency
They produce sound waves vibrating with the same phase

There are discrete energy levels in atoms. It was first experimentally demonstrated by
Marsden’s experiment
Rutherford’s experiment
Somerfield experiment
Franck Hertz experiment

Steel is preferred for making springs over copper. Why?
Steel is less likely ot be oxidized
Young’s modulus of steel is more than that of copper
Young’s modulus of copper is more than that of steel
Steel is cheaper

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are:
6, 12
3, 15
5, 13
4, 14

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will
Decreases
Remain the same
First A then B
Increas

If the earth were to rotate faster, than its present speed the weight of an object will
Remain unchanged at the equator but increase at the poles
Decrease at the equator but remain unchanged at the poles
Increase at the equator but remain unchanged at the poles
Remain unchanged at the decrease but decrease at the poles

In a Millikan’s oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is
3.9
4.2
6
4

In a common base transistor circuit, the current gain is 0.98. On changing the emitter current by 5.00 mA, the change in collector current is
2.45 mA
0.916 mA
4.9 mA
5.1 mA

The unit of inductance is equivalent to
A x s/v
V x s/A
V x A/s
V/A x s

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