NAT IIP Physical Science Physics Preparation Online Test for Pakistani Students

MCQ's Test For NAT II Physical Science Physics

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NAT II Physical Science Physics

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Question # 1

A monochromatic source of light is placed at a large distance d from a metal surface. Photoelectrons are ejected at rate n, kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly

Question # 2

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 3

A fly is sitting on the objective of a telescope pointed towards the moon.
What effect is expected on the photography of the moon taken through the telescope?

Question # 4

The sieman is the SI unit of

Question # 5

The nuclear model of atom was proposed by

Question # 6

A piece of fuse wire melts when a current of 15 ampere flows through it.
With this current, if it dissipates 22.5 W, the resistance of fuse wire will be

Question # 7

Choose the correct statement

Question # 8

Boyle's law is applicable in

Question # 9

At constant volume temperature is increased. Then

Question # 10

There are discrete energy levels in atoms. It was first experimentally demonstrated by

Question # 11

Centre of mass is a point

Question # 12

The half-life of a radio-isotope is 5 years. The fraction of atoms decayed in this substance after 15 years will be

Question # 13

The length of a telescope is 36 cm. The focal lengths of its lenses can be

Question # 14

The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is:

Question # 15

The magnetic moment of a circular coil carrying current is

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NAT-II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Absolute temperature can be calculated by
A. Mean square velocity
B. Motion of the molecule
C. Both A and B
D. None of these
2 When the length of a microscope tube increase, its magnifying power
A. Decreases
B. Increases
C. Does not Change
D. May increase or decrease depending on the observer and the place of observation
3 A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
4 The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is:
A. 8
B. 4
C. 6
D. 7
5 A 50-volt battery is connected across 10-ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5 ohm
C. 1.1 ohm
D. 5.0 ohm
6 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
A. 0.916 mA
B. 2.45 mA
C. 4.9 mA
D. 5.1 mA
7 An object is placed at a distance of f/2 from a convex lens. The image will be
A. At one of the foci, virtual and double its size
B. At, 3f/2, real and inverted
C. At 2f, virtual and erect
D. At f, real and inverted
8 If the earth were to rotate faster, than its present speed the weight of an object will
A. Increase at the equator but remain unchanged at the poles
B. Decrease at the equator but remain unchanged at the poles
C. Remain unchanged at the decrease but decrease at the poles
D. Remain unchanged at the equator but increase at the poles
9 When n-type of semiconductor is heated
A. Number of electrons increases while that of holes decreases
B. Number of holes increases while that of electron decreases
C. Number of electrons and holes remains same
D. Number of electrons and holes increases equally
10 A sun rise or sun set, the sun looks reddish because:
A. The sun is coldest at these times
B. Of the effects of reflection and refraction
C. The sun is hottest at these times
D. Of the scattering of light

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