Question 1.
The best conductor of electricity among the following is :
A. Copper
B. Iron
C. Aluminium
D. Silver
Ans: D. Silver
Question 2.
Lightning is produced when
A. Similar charges of electricity rush towards each other and then get repelled
B. Clouds strike against impurities in air and the friction burns up these impurities
C. Strong opposite charges in different clouds break down the resistance offered by the intervening air
D. Water vapour produces electricity in the clouds
Ans: C. Strong opposite charges in different clouds break down the resistance offered by the intervening air
Question 3.
Pure water is bad conductor of electricity because it is
A. Feebly ionized
B. Not volatile
C. A very good solvent
D.A non-polar solvent
Ans: A. Feebly ionized
Question 4.
Fuse wire is made of an alloy of
A. Tin and Lead
B. Tin and Copper
C. Lead and Copper
D. Copper and Silver
Ans: A. Tin and Lead
Question 5.
Kilowatt-hour is the unit of :
A. Energy
B. Power
C. Force
D. Momentum
Ans: A. Energy
Question 6.
The metal used to make lightning conductors is
A. Iron
B. Aluminium
C. Copper
D. Zinc
Ans: C. Copper
Question 7.
The metal whose electrical conductivity is more, is
A. Copper
B. Aluminium
C. Silver
D. Lead
Ans: C. Silver
Question 8.
In the electrical circuit of a house, the fuse acts as
A. A load
B. A thermopile
C. A safety device
D. A step down device
Ans: C. A safety device
Question 9.
Copper wires are generally used for electrical power transmission instead of iron wire because :
A. Copper is cheaper than iron
B. Copper is lighter than iron
C. Copper is a better conductor of electricity than iron
D. Copper can take higher power than iron
Ans: C. Copper is a better conductor of electricity than iron
Question 10.
Good conductor of electricity is
A. Dry air
B. Paper
C. Kerosene
D. Graphite
Ans: D. Graphite
Question 11.
Which of the following is a conductor of electricity ?
A. Rubber
B. Pure water
C. Salt water
D. Benzene
Ans: C. Salt water
Question 12.
The nature of fuse wire is
A. High resistance and low melting point.
B. High resistance and high melting point.
C. Low resistance and high melting point.
D. Low resistance and low melting point.
Ans: A. High resistance and low melting point.
Question 13.
The earth-wire of a cable is connected to
A. The outer metallic body of the appliance
B. The fuse of the appliance
C. The filament of the appliance
D. Short circuitry of the appliance
Ans: B. The fuse of the appliance
Question 14.
One Kilowatt hour is equal to –
A. 3.6 Mega Joule
B. 3.8 Mega Joule
C. 3.2 Mega Joule
D. 4.0 Mega Joule
Ans: A. 3.6 Mega Joule
Question 15.
A bird sitting on a high tension electric wire does not get electrocuted because
A. It has high resistance
B. The body is earthed
C. It does not form a closed path for the flow of current
D. Its feet are good insulators
Ans: C. It does not form a closed path for the flow of current
Question 16.
Which of these is exhibiting kinetic energy?
A. An archer with a flexed bow
B. A person sitting on a couch while watching TV
C. A space station orbiting Earth
D. All of the above
Ans: C. A space station orbiting Earth
Question 17.
Lightning is caused due to
A. Electric power
B. Electric discharge
C. Electric leak
D. Electric pressure
Ans: B. Electric discharge
Question 18.
Materials that usually are good conductors of electricity?
A. Aluminium
B. Lead
C. Nickel
D. Wood
Ans: A. Aluminium
Question 19.
The fuse in our domestic electric circuit melts when there is a high rise in
A. Inductance
B. Current
C. Resistance
D. Capacitance
Ans: B. Current
Question 20.
An object having the capability to do work is said to possess
A. Inertia
B. Force
C. Pressure
D. Energy
Ans: D. Energy
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
- Physics MCQs Set-9
- 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
- Physics MCQs Set-48
- Physics MCQs Set-49
- Physics MCQs Set-50
- Physics MCQs Set-51
- Physics MCQs Set-52
- Physics MCQs Set-53
- 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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