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NAT I Medical Physics MCQs With Answers
Question # 1
To make the frequency double of na oscillator we have to
Choose an answer
Double the mass
Half the mass
Quadruple the mass
Reduce the mass to one-fourth
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Question # 2
As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1 the kinetic energy K and potential energy U change as
Choose an answer
K two-fold,U also two-fold
K four-fold,U also four-fold
K four-fold,U two-fold
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Question # 3
In an L-R circuit time constant is that time in which current grows from zero to the value
Choose an answer
0.63 I
o
0.50 I
o
0.73 I
o
I
o
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Question # 4
A moving charge will gain energy due to the application of
Choose an answer
Electric field
Magnetic
Both of these
None of these
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Question # 5
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:
Choose an answer
0.196 mA
2.45 mA
4.9 mA
5.1 mA
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Question # 6
With the propagation of a longitudinal wave through a material medium the quantities transmitted in the propagation direction are
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Energy momentum and mass
Energy
Energy and mass
Energy and linear momentum
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Question # 7
The velocity of a particle at an instant is 10 m/s and after 5 s the velocity of the particle is 20 m/s.The velocity 3s before in m/s is:
Choose an answer
8
4
6
7
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Question # 8
The velocity v of a particle at time t is given by:
v = at + b / t + c
The dimensional formula of a,b and c care respectively:
Choose an answer
L
2
; T and LT
2
LT
2
; LT and L
LT
-2
; L and T
L;LT and
T
-2
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Question # 9
Light appears to travel in straight lines since
Choose an answer
It is not absorbed by the atmosphere
It is reflected by the atmosphere
Its wavelength is very small
Its velocity is very large
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