Medical PG Entrance Physics Practice Test Page-2

Medical PG Entrance Physics Practice Test Page-2

Medical PG Entrance - Physics Practice Test 2

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Question 1
When the two surface are coated with the lubricant, then they will:
A
slide upon each other
B
stick to each other
C
roll upon each other
D
none of the above
Question 2
A transverse wave passes through a string with the equation y = 10 sin Π (0.02x — 2.OOt) where x is in metre and I in second. The maximum velocity of the particle in wave motion is: 
A
9 m/s
B
63 m/s
C
49 m/s
D
70 m/s
Question 3
A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of 30 rn/s. Frequency of sound to be heard by the listener is: (velocity of sound = 330 m/s)
A
186.5 Hz
B
281 .2 Hz
C
733.3 Hz
D
844.8 Hz
Question 4
A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg and 1.0 kg. The smaller mass goes at a speed of 80 m/s. The total energy imparted to the two fragments is
A
2.07 kJ
B
3.14 kJ
C
4.8 kJ
D
6.8 kJ
Question 5
The escape velocity from the earth is 11 .2 km/s. The escape velocity from a planet having twice the radius and the same mean density as the earth, is  
A
11.2km/s
B
22.4 km/s
C
15.83 km/s
D
7.92 km/s
Question 6
A solenoid is 1.5 m long and its inner diameter is 4.0 cm. It has 3 layers of windings of 1000 turns each and carries a current of 2.0 A. The magnetic flux for a cross-section of the solenoid is nearly 
A
5.1 x 10-5Wb
B
6.2 x 10-5 Wb
C
6.31 x10-3Wb
D
4.5 x 10-7 Wb
Question 7
A conducting sphere of radius 10 cm is charged with 1 OpC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of
A
1:2
B
4:1
C
2:1
D
1:4
Question 8
In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from
A
Pascal’s law
B
Stokes’ law
C
Bernoulli’s principle
D
Archimedes’ principle
Question 9
A gun fires a bullet of mass 50 g with a velocity of 30 m/s. Due to this. the gun is pushed back with a velocity of 1 m/s, then the mass of the gun is
A
1.5kg
B
4.5 kg
C
0.5 kg
D
6.0 kg
Question 10
Given a current carrying wire of non-uniform cross-section. Which one of the following is constant through out the length of wire ? 
A
Current only
B
Current and drift speed
C
Drift speed only
D
Current, electric field and drift speed
Question 11
The latent heat of vaporisation of water is 2240 J. If the work done in the process of vaporization of 1 g is 168 J, then increase in internal energy will be
A
1644 J
B
2072 J
C
3240 J
D
3600 J
Question 12
An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of:
A
refraction
B
reflection
C
total internal reflection
D
dispersion
Question 13
In a sinusoidal wave the time required for a particular point to move from equilibrium position to maximum displacement is 0.17 s, then the frequency of wave is:
A
1.47Hz
B
2.47 Hz
C
3.47 Hz
D
5.48 Hz
Question 14
The ratio of intensities of two waves is 9: 1. If they superimpose, the ratio of maximum to minimum intensity will be 
A
16:1
B
16:9
C
4:1
D
1:9
Question 15
An electric bulb marked 40 W and 200 V, is used in a circuit of supply voltage 100 V. Now, its power is:
A
10W
B
15W
C
30W
D
45W
Question 16
A photon of energy 4 eV is incident on a metal surface whose work function is 2 eV. The minimum reverse potential to be applied for stopping the emission of electrons is:
A
2V
B
4V
C
8V
D
16V
Question 17
Simple pendulum is executing simple harmonic motion with time period T. If the length of the pendulum is increased by 21%, then the increase in the time period of the pendulum of the increased length is:
A
12%
B
11%
C
10%
D
9%
Question 18
A body of mass 5 kg has momentum of 10 kg rn/s. When a force of 0.2 N is applied on it for 10 s. the change in its kinetic energy is: 
A
4.4J
B
2.3J
C
2.5J
D
1.5J
Question 19
The bulk modulus of a metal is 1010 N/rn2 and Poisson’s ratio 0.20. If average distance between the molecules is 3 A then the interatomic force constant is
A
5.4 N/m
B
80 N/m
C
8.0 N/m
D
40 N/m
Question 20
The Magnetic Resonance Imaging (MRI) is based on the phenomenon of:
A
nuclear magnetic resonance
B
electron spin resonance
C
electron paramagnetic resonance
D
diamagnetism of human tissues
Question 21
Two projectiles are projected with the same velocity. If one is projected at an angle of 300 and the other at 60° to the horizontal. The ratio of maximum heights reached, is:
A
1:3
B
9:1
C
3:1
D
1: 9
Question 22
The sun emits a light with maximum wave length 510 nm while another star emits a light with maximum wavelength of 350 nm. The ratio of surface temperature of sun and the star will be: 
A
0.68
B
0.48
C
0.83
D
0.56
Question 23
The capacitors C1, C3, C4, C5 have a capacitance 4 µF each and C2 has capacitance 10 µF. The effective capacitance between a and d will be: 
A
10µF
B
5µF
C
4µF
D
1µF
Question 24
An object is immersed in a fluid. In order that the object becomes invisible, it should:
A
behave as a perfect reflector
B
absorb all light falling on it
C
have refractive index one
D
have refractive index exactly matching with that of the surrounding fluid
Question 25
Bernoulli’s principle is based on the law of conservation of:
A
mass
B
energy
C
angular momentum
D
linear momentum
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