Objective Type Physics Questions for Entrance Exams class 1
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1. Mirage is due to _________
A. Equal heating of different parts of the
atmosphere
B. Magnetic disturbances in the atmosphere
C. Depletion of ozone layer in the atmosphere
D. Unequal heating of different parts of the
atmosphere
Answer: D
2. Light year is a unit of ___________
A. Time
B. Light
C. Intensity of light
D. distance
Answer: D
3. The light from the sun reaches us in nearly__________
A.
8
minutes
B.
4
minutes
C.
2
minutes
D.
16
minutes
Answer: A
4. ___________is not used in the field of physics.
A.
Stock
value
B.
Latent
heat
C.
Nuclear
fusion
D.
Refractive
index
Answer: A
5. The working principle of a washing machine is
____________
A.
diffusion
B.
centrifugation
C.
reverse
osmosis
D.
dialysis
Answer: B
6. The speed of light will be minimum while passing
through_________
A. water
B. air
C. vaccum
D. glass
Answer: D
7. The stars appears to move from east to west
because___________
A.
The
earth rotates from east to west
B.
The
earth rotates from west to east
C.
All
stars move from east to west
D.
The
background of the stars moves from west to east
Answer: B
8. Radiocarbon is produced in the atmosphere as result of
____________
A. Action of solar radiations particularly
cosmic rays on carbon dioxide present in the atmosphere
B. collision between fast neutrons and
nitrogen nuclei present in the atmosphere.
C. Action of ultraviolet light from the sun on
atmospheric oxygen
D. Lightning discharge in atmosphere
Answer: B
9. Nuclear sizes are expressed in a unit
named____________
A. Tesla
B. Newton
C. Angstrom
D. Fermi
Answer: D
10. Planets do not twinkle because_________
A. They are nearer to earth and hence we
receive a greater amount of light
B. They are very far away from the earth
resulting in decrease in intensity of light
C. They emit light of a constant intensity
D. Their distance from the earth does not
change with time
Answer: A
11. The absorption of ink by blotting paper involves
___________
A. Siphon action
B. Diffusion of ink through the blotting
C. capillary action phenomenon
D. Viscosity of ink
Answer: C
12. RADAR is used for_____________
A. receiving a signals in a radio receiver
B. locating submerged submarines
C. locating geostationary satellites
D. detecting and locating the position of
objects such as Aeroplanes
Answer: D
13. Sound waves in air are_____________
A. electromagnetic
B. longitudinal
C. polarized
D. transverse
Answer: B
14. Sound of frequency below 20 Hz is called___________
A. audio sounds
B. infrasonic
C. supersonics
D. ultrasonic
Answer: B
15. Select the Scalar Quantity_________
A. Pressure
B. Force
C. Velocity
D. Acceleration
Answer: A
16. Metals are good conductors of electricity
because________
A. They have high melting point
B. The atoms are lightly packed.
C. They contain free electrons
D. All of the above
Answer: C
17. Moment of inertia is____________
A. Phasor
B. Scalar
C. Vector
D. Tensor
Answer: D
18. Sound travels at the fastest speed in__________
A. water
B. steel
C. air
D. vacuum
Answer: B
19. One thousand microns is equal to___________
A. 10-3m
B. 10-9m
C. 10-6m
D. 10-12m
Answer: A
20. Superconductors are substances which ________
A. offer no resistance to the flow of
electricity
B. offer high resistance to the flow of
current
C. conduct electricity at high temperatures
D. conduct electricity at low temperature
Answer: A
21. Radio telescopes are better than optical telescopes
because
A. they can detect faint galaxies which no
optical telescope can
B. they can work even in cloudy conditions
C. they can work during the day and night
D. All of the above
Answer: D
22. Intensity of sound at a point is its distance
from the source
A. directly proportional to square of
B. directly proportional to square of
C. inversely proportional to square of
D. inversely proportional to
Answer: C
23. Rainbow is due to _____
A. refraction and reflection of sunlight by
water droplets
B. absorption of sunlight in minute water
droplets
C. diffusion of sunlight through water
droplets
D. ionization of water deposit
Answer: A
24. Isotopes of an elements contain _______
A. equal number of protons and electrons
B. the same number of protons but different
number of neutrons
C. the same number of neutrons but different
number of protons
D. equal number of nucleons
Answer: B
25. The purpose of choke in tube light is________
A. Induce low resistance
B. Induce high voltage
C. Induce low voltage
D. Induce high resistance
Answer: B
26. Sir C.V. Raman was awarded Nobel prize for his work
connected with which of the following phenomenon of radiation?
A. Diffraction
B. Interference
C. Scattering
D. Polarization
Answer: C
27. Supersonic plane fly with the speed________
A. of sound
B. less than the speed of sound
C. greater than the speed of sound
D. of light
Answer: C
28. The optical fibre works on the _______
A. total internal reflection
B. principle of refraction
C. interference
D. scattering
Answer: A
29. Mercury is commonly used as a thermometric fluid
rather than water because__________
A. density of mercury is more than the water
B. specific heat of mercury is less than water
C. specific heat of mercury is more than water
D. mercury has greater visibility than water
Answer: D
30. Light Emitting Diodes (LED) is used in fancy
electronic devices such as toys emit _________
A. X-rays
B. ultraviolet light
C. radio waves
D. visible light
Answer: D
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