NAT IIP Physical Science Physics Preparation Online Test for Pakistani Students

MCQ's Test For NAT II Physical Science Physics

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

Question # 2

In an L-R circuit, time constant is that time in which current grows from zero to the value

Question # 3

What remains constant in the field of central force?

Question # 4

A body moves a distance of 10 m along a straight line under the action of a force of 5 Newton's. If the work done is 25 joules, the angle which the force takes with the direction of motion of the body is:

Question # 5

Ball pen function on the principle of

Question # 6

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 7

If a diamagnetic substance is brought near north or south pole of a bar magnet it is

Question # 8

Radio waves of constant amplitude can be generated with

Question # 9

To explain his theory Bohr used

Question # 10

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?

Question # 11

A prism splits a beam of white light into its seven constituent colors. This is so because

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

With the increase of temperature viscosity

Question # 14

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

Question # 15

Two sources of sound are said to be coherent if

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Sr. # Question Answer
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?

A. 10 A

B. 5 A

C.33.3 A

D. 3.33 A

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

A. 1

B. 3/4

C.7/8

D. 5/8

3 In a simple harmonic motion (SHM), which of the following does not hold?

A. To force on the particle is maximum at the ends

B. The acceleration in minimum at the mean position

C.The potential energy is maximum at the mean position

D. The kinetic energy is maximum at the mean position

4 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

5 Two sources of sound are said to be coherent if

A. They produce sounds of equal intensity

B. They produce sounds of equal frequency

C.They produce sound waves vibrating with the same phase

D. They produce sound waves with zero or constant phase different all instant of time

6 All of the following statements are correct except

A. The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses

B. The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent

C.The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece

D. The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece

7 The dot product of two vectors is negative when

A. They are parallel vectors

B. They are anti-parallel vectors

C.They are perpendicular vectors

D. None of the above is correct

8 A ten-ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts:

A. 1310 W

B. 670 W

C.810 W

D. 1210 W

9 According to classical theory the proposed circular path of an electron in Rutherford model of atom will be

A. Circular

B. Straight line

C.Parabolic

D. Spiral

10 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

11 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

12 A force of 10N is acting along y-axis. Its component along x-axis is

A. 10N

B. 20N

C.100N

D. Zero N

13 Planck's constant has the dimensions of:

A. Energy

B. Momentum

C.Frequency

D. Angular momentum

14 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

A. Zero

B. 10 ohm

C.1 ohm

D. 0.10 ohm

15 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

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