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

In Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If its produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be

Question # 2

What remains constant in the field of central force?

Question # 3

A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm.

Question # 4

The essential distinction between X-rays andγ-rays is that

Question # 5

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

Question # 6

To increase the magnification of a telescope

Question # 7

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

Question # 8

The part of a transistor which is heavily doped to produce large number of majority carriers is

Question # 9

A body moving in circular motion with constant speed has

Question # 10

Bernoulli's equation is based upon law of conservation

Question # 11

A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if

Question # 12

Ball pen function on the principle of

Question # 13

To explain his theory Bohr used

Question # 14

The conductivity of a superconductor is

Question # 15

A person standing near the track of a fast moving train has tendency to fall towards it because of

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NAT-II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 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
2 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collisions will be in straight lines
D. Collisions will not change
3 Band spectrum is produced by
A. H
B. He
C. H2
D. Na
4 Ball pen function on the principle of
A. Viscosity
B. Boyle's law
C. Gravitational force
D. Surface tension
5 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?
A. 10 A
B. 5 A
C. 33.3 A
D. 3.33 A
6 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
7 The direction of induced current is such that it opposes the very cause that has produced it. This is the law of
A. Lenz
B. Faraday
C. Kirchoff
D. Fleming
8 Huygen's wave theory of light cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
9 Which one of the following phenomena is not explained by Huygen's construction of wavefront?
A. Refraction
B. Reflection
C. Diffraction
D. Origin of spectra
10 To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined
A. Parallel
B. Antiparallel
C. At angle 60°
D. Perpendicular to each other

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