Force, Motion and Energy TNPSC Group 1 Questions

Physics

Force, Motion and Energy MCQ Questions

7.
When the mass and velocity are doubled the kinetic energy will
A.
remain the same
B.
increase twice
C.
increase 6 times
D.
increase 8 times
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ANSWER :
D. increase 8 times
8.
A small drop of mercury is spherical due to
A.
Viscosity
B.
surface tension
C.
gravity
D.
elasticity
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ANSWER :
B. surface tension
9.
The relation amongst velocity(V), frequency (n) and wavelength(lamda) is
A.
V=lamda/n
B.
V=1/n lamda
C.
V=n lamda
D.
V=n/lamda
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ANSWER :
C. V=n lamda
10.
what kind of energy works when a watch spring is wound up?
A.
Kinetic energy
B.
Potential energy
C.
Electrical energy
D.
Unknown energy
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ANSWER :
B. Potential energy
11.
Which one of the following is a vector quantity?
A.
Momentum
B.
Pressure
C.
Energy
D.
Work
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ANSWER :
A. Momentum
12.
Sound energy is converted into electrical energy(audio signal) by a
A.
Microphone
B.
Loud speaker
C.
Telephone
D.
Radio
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ANSWER :
A. Microphone