Question 1.
The reverse effect of X–ray emission is
A. Raman effect
B. Compton effect
C. Zeeman effect
D. Photoelectric
Ans: D. Photoelectric
Question 2.
Where do the electrical charges reside in a charged conductor?
A. At the core
B. Throughout the body
C. Depended upon the nature of the body
D. Outer surface of the body
Ans: D. Outer surface of the body
Question 3.
An Electric generator is based on which of the following scientific principles?
A. Faraday’s law of Electromagnetic Induction
B. Super Conductivity
C. Laws of Thermodynamics
D. Newton’s Law of Motion
Ans: A. Faraday’s law of Electromagnetic Induction
Question 4.
Coolis tube is used to produce
A. Radio waves
B. Micro waves
C. X-rays
D. Gama rays
Ans: C. X-rays
Question 5.
The term photon refers to
A. Light ray
B. Sub atomic particle
C. Radiation
D. None of the above
Ans: B. Sub atomic particle
Question 6.
The strength of an electromagnet can be increased by
A. Increasing the length of the coiled wire
B. Increasing current supply
C. Increasing the number of turns
D. All of the above
Ans: D. All of the above
Question 7.
Planck’s constant has the dimensions of :
A. Energy
B. Linear momentum
C. Angular momentum
D. Force
Ans: A. Energy
Question 8.
Who among the following discovered X-rays?
A. Marie Curie
B. J.J Thomson
C. W.C Roentgen
D. James Chadwick
Ans: C. W.C Roentgen
Question 9.
In a conductor
A. There is no conduction band
B. The forbidden energy gap is very wide
C. The forbidden energy gap is very narrow
D. The valence band and the conduction band overlap each other
Ans: D. The valence band and the conduction band overlap each other
Question 10.
The unit of Planck’s constant is
A. Js
B. Js–2
C. J/s
D. Js2
Ans: A. Js
Question 11.
What is the unit of Magnetic Induction?
A. Ohm
B. Farad
C. Volt
D. Henry
Ans: D. Henry
Question 12.
Ozone layer in the outer atmosphere helps us in
A. Reflecting radio waves and makes radio communication possible
B. Regulating the temperature of atmosphere
C. Absorbing cosmic ray particles
D. Absorbing UV radiations
Ans: D. Absorbing UV radiations
Question 13.
The unit of intensity of electric field is
A. N/c
B. N/m
C. J/c
D. Volt
Ans: A. N/c
Question 14.
When a vehicle passes, TV reception gets distorted. This is because
A. Metal reflects radiowaves
B. Spark plug creates electromagnetic disturbances
C. Vehicle pollution affects the performance of the TV components
D. Modern vehicles use electroignition system
Ans: B. Spark plug creates electromagnetic disturbances
Question 15.
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
A. Visible
B. Infrared
C. Ultraviolet
D. X-ray
Ans: C. Ultraviolet
Question 16.
The waves used in sonography are
A. Micro waves
B. Infra-red waves
C. Sound waves
D. Ultrasonic waves
Ans: D. Ultrasonic waves
Question 17.
. . . . . . . . . exerts a force on anything that has an electric charge.
A. Electric field
B. Electrostatic force
C. Inductive field
D. All of the above
Ans: A. Electric field
Question 18.
The unit of magnetic permeability is
A. Henry/meter
B. Henry
C. Weber
D. Weber/meter
Ans: A. Henry/meter
Question 19.
Ozone layer above the surface of Earth provides a shield against
A. X-rays
B. Ultra-violet rays
C. Gamma rays
D. Infra-red rays
Ans: B. Ultra-violet rays
Question 20.
In the remote control of television, electromagnetic waves used are
A. Ultraviolet
B. Microwave
C. Radiowave
D. Infrared
Ans: D. Infrared
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
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- Physics MCQs Set-10
- Physics MCQs Set-11
- Physics MCQs Set-12
- Physics MCQs Set-13
- Physics MCQs Set-14
- Physics MCQs Set-15
- Physics MCQs Set-16
- Physics MCQs Set-17
- Physics MCQs Set-18
- Physics MCQs Set-19
- Physics MCQs Set-20
- Physics MCQs Set-21
- Physics MCQs Set-22
- Physics MCQs Set-23
- Physics MCQs Set-24
- Physics MCQs Set-25
- Physics MCQs Set-26
- Physics MCQs Set-27
- Physics MCQs Set-28
- Physics MCQs Set-29
- Physics MCQs Set-30
- Physics MCQs Set-31
- Physics MCQs Set-32
- Physics MCQs Set-33
- Physics MCQs Set-34
- Physics MCQs Set-35
- Physics MCQs Set-36
- Physics MCQs Set-37
- Physics MCQs Set-38
- Physics MCQs Set-39
- Physics MCQs Set-40
- Physics MCQs Set-41
- Physics MCQs Set-42
- Physics MCQs Set-43
- Physics MCQs Set-44
- Physics MCQs Set-45
- Physics MCQs Set-46
- Physics MCQs Set-47
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- Physics MCQs Set-50
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- Physics MCQs Set-54
- Physics MCQs Set-55
- Physics MCQs Set-56
- Physics MCQs Set-57
- Physics MCQs Set-58
- Physics MCQs Set-59
- Physics MCQs Set-60
- Physics MCQs Set-61
- Physics MCQs Set-62
- Physics MCQs Set-63
- Physics MCQs Set-64
- Physics MCQs Set-65
- Physics MCQs Set-66
- Physics MCQs Set-67
- Physics MCQs Set-68
- Physics MCQs Set-69
- Physics MCQs Set-70
- Physics MCQs Set-71
- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
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