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

Surface tension of water is due to

Question # 2

Two sources of sound are said to be coherent if

Question # 3

A cable that can support a load W is cut into two equal parts. The maximum load that can be supported by either part is:

Question # 4

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 5

A boy is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

Question # 6

When sound waves travel from air to water which of these remains constant?

Question # 7

If the earth were to rotate faster, than its present speed the weight of an object will

Question # 8

In which of the following states does the incandescent substance give continuous spectrum?

Question # 9

A 50-volt battery is connected across 10-ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 10

A wire of radius r has resistance R, It it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 11

Who explained the origin of the Fraunhoffer lines?

Question # 12

Mechanical waves on the surfaces of a liquid are

Question # 13

How does the Young's modulus vary with the increase of temperature?

Question # 14

In case of p-n junction diode, at high value of reverse bias, the current rises sharply. The value of reverse bias is known as:

Question # 15

All of the following statements are correct except

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NAT-II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value, the mass remaining constant?
A. 12
B. 6
C. 3
D. 2
2 Huygen's wave theory of light cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
3 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
4 The essential distinction between X-rays andγ-rays is that
A. γ-rays have smaller wavelength than X-rays
B. γ-rays emanate from nucleus while X-rays emanate from outer part of the atom
C. γ-rays have greater ionizing power than X-rays
D. γ-rays are more penetrating than X-rays
5 Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
6 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
A. 40 km/h
B. 48 km/h
C. 50 km/h
D. 60 km/h
7 To explain his theory Bohr used
A. Conservation of linear momentum
B. Conservation of angular momentum
C. Conservation of quantum frequency
D. Conservation of energy
8 Copper and germanium are cooled to 70K from room temperature, then
A. Resistance of copper increases while that of germanium decreases
B. Resistance of copper decreases while that of germanium increases
C. Resistance of both decreases
D. Resistance of both increases
9 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
10 The angle between rectangular components of a vector is
A. 0°
B. 60°
C. 90°
D. 120°

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