Physics MCQS with Answers Set 3

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Physics MCQS with Answers


Absolute temperature can be calculated by
Both A and B
Motion of the molecule
None of these
Mean square velocity

Which of the following lists of physical quantities consists only of vectors:
Force, volume, momentum
Force, acceleration, velocity
Velocity, acceleration, mass
Time, temperature, velocity

The unit of electric current ‘ampere’ is the amount of current flowing through each of two parallel wires 1 m apart and of infinite length will give rise to a force between them equal to
2 x 10-7N/m
1 x 10-2N/m
4 x 102N/m
1 N/m

What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
7:09
4:05
16:25
1:01

According to Stoke’s law, drag force depends on
Terminal velocity
Instantaneous velocity
Initial velocity
Final velocity

A cable breaks if stretched by more than 2 mm. It is cut into two equal parts. How much either part can be stretched without breaking?
0.25 m
1 mm
0.5 m
2 mm

Ultra-violet radiation of 6.2 eV falls on an aluminium surface. K.E. of fastest electron emitted is (Work function = 4.2 eV)
3.2 x 10-19 J
9 x 10-32 J
7 x 10-25 J
3.2 x 10-21 J

When sound waves travel from air to water which of these remains constant?
Velocity
All the above
Wavelength
Frequency

A photoelectric cell coverts
Light energy to electrical energy
Light energy to light energy
Light energy to elastic energy
Electrical energy to light energy

The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (
7N13
6C13
5B13
7N14

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