MCQS of Physics for NTS
The essential distinction between X-rays and y-rays is that
y-rays are more penetrating than X-rays
y-rays emanate from nucleus while X-rays emanate from outer part of the atom
y-rays have greater ionizing power than X-rays
y-rays have smaller wavelength than X-rays
When we apply reverse bias to a junction diode it
Raises the potential barrier
Increase the majority carrier current
Decrease the majority carrier current
Lowers the potential barrier
In which case application of angular velocity is useful?
When velocity of body is in a straight line
None of these
When a body is rotating
When velocity is in a straight line
Absolute temperature can be calculated by
Motion of the molecule
None of these
Both (A) and (B)
Mean square velocity
Which of the following lists of physical quantities consists only of vectors:
Force,acceleration,velocity
Force,volume,momentum
Time,temperature,velocity
Velocity,acceleration,mass
In a simple harmonic motion (SHM) which of the following does not hold?
The potential energy is maximum at the mean position
The acceleration is minimum at the mean position
The force on the particle is maximum at the ends
The kinetic energy is maximum at the mean position.
A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be:
60 km/h
50 km/h
40 km/h
48 km/h
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:
8
6
7
4
The dimensional formula of toque is:
[ML2T2]
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 magnitude are:
5, 13
3, 15
4, 14
6, 12
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