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

00:00
Question # 1

A 220 V, 50 Hz. A.C. source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?

Question # 2

Which of the modulus of elasticity is involved in compression a rod to decrease its length?

Question # 3

In a voltmeter the conduction takes place due to

Question # 4

When boron is added as an impurity to silicon, the resulting material is.

Question # 5

The primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an a.c. supply of 20 V, 50 Hz. The secondary will have an output of

Question # 6

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

Question # 7

A man pushes a wall but fails to displace it. He does:

Question # 8

The number of translation degrees of freedom for a diatomic gas is

Question # 9

Which of the following four statement is false?

Question # 10

What is the average energy of N molecules of monoatomic gas?

Question # 11

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

Question # 12

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

Question # 13

If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be

Question # 14

To make the frequency double of an oscillator, we have to

Question # 15

A point charge Q is placed at the mid-point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to

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NAT-II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
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
A. 2n and 2E
B. 4n and 4E
C. 4n and E
D. N and 4E
2 The temperature at which the speed of sound becomes double as was at 27°C is
A. 273°C
B. 0°C
C. 927°C
D. 1027°C
3 In a simple harmonic motion the kinetic energy (KE) and the potential energy (PE), are such that throughout the motion
A. KE remains constant
B. PE remains constant
C. KE/PE is constant
D. KE+PE remains constant
4 The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s2. The distance covered by the body in the 5th second of its motion is
A. 25 m
B. 35 m
C. 50 m
D. 85 m
5 Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is
A. Zero
B. 5N
C. 25N
D. 150N
6 The velocity of falling raindrops attains limited value because of
A. Up thrust of air
B. Viscous force exerted by air
C. Surface tension effect
D. Air currents atmosphere
7 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?
A. 0.25 m
B. 0.5 m
C. 1 mm
D. 2 mm
8 The twinkling of stars is due to
A. The fact that stars do not emit light continuously
B. The refractive index of the earth's atmosphere fluctuate
C. Intermittent absorption of star light by its own atmosphere
D. None of these
9 The length of a telescope is 36 cm. The focal lengths of its lenses can be
A. 30 cm, 6 cm
B. -30 cm, -6 cm
C. 30 cm, -6cm
D. -30cm, 6cm
10 The angle between rectangular components of a vector is
A. 0°
B. 60°
C. 90°
D. 120°

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