Question 1.
It is easier to roll a barrel full of coal tar than to pull it because
A. the full weight of the barrel comes into play when it is pulled
B. the rolling friction is much less than the sliding friction
C. more surface area of the barrel is in contact with the road when it is pulled
D. coal tar is a liquid and it flows in the barrel when it is rolled
Ans: B. the rolling friction is much less than the sliding friction
Question 2.
Which tube used to produce X-ray?
A. Coolidge tube
B. X-ray tube
C. Roentgen
D. None of these
Ans: A. Coolidge tube
Question 3.
What is the value of 1 kW = ?
A. 1000 W
B. 10 W
C. 100 W
D. 10000 W
Ans: A. 1000 W
Question 4.
The fuse in an electric circuit is connected in
A. Series with neutral
B. Parallel to live
C. Parallel to neutral
D. Series with live
Ans: D. Series with live
Question 5
Minimum number of unequal vectors which can give zero resultant are
A. two
B. three
C. four
D. more than four
Ans: B. three
Question 6.
A Fuse wire is characterised by
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 7.
The electric current in a metal wire is due to the flow of –
A. Electrons
B. Protons
C. Ions
D. Holes
Ans: A. Electrons
Question 8.
Working of safety fuses depends upon
- magnetic effect of the current
- chemical effect of the current
- magnitude of the current
- heating effect of the current
Select the correct answer using the code given below.
A. 1, 2, 3 and 4
B. 1, 2 and 3 only
C. 3 and 4 only
D. 4 only
Ans: C. 3 and 4 only
Question 9.
Intensity of sound has
A. an object existence
B. a subject existence
C. no existence
D. both subjective and objective existence
Ans: A. an object existence
Question 10.
When the main switch of the house is put off it disconnects the
A. Live wire only
B. Live wire and the earth wire
C. Live wire and the neutral wire
D. Earth wire and the neutral wire
Ans: C. Live wire and the neutral wire
Question 11.
An electric fuse is based on
A. The chemical effect of the current
B. The magnetic effect of the current
C. The heating effect of the current
D. All of the above
Ans: C. The heating effect of the current
Question 12.
During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to
A. Remain in the car
B. Get out of the car and lie flat in the ground
C. Abandon the car and take shelter under a nearby tree
D. Touch the nearest electric pole
Ans: A. Remain in the car
Question 13.
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
A. east
B. west
C. northeast
D. southeast
Ans: A. east
Question 14.
Electric power is measured in units of
A. Volt
B. Joule
C. Watt
D. Ampere
Ans: C. Watt
Question 15.
Metals are good conductors of electricity because
A. The atoms are lightly packed
B. They contain free electrons
C. They have high melting point
D. All the above
Ans: B. They contain free electrons
Question 16.
The unit of electrical power is
A. Bolt
B. Watt
C. Kilowatt hour
D. Ampere
Ans: B. Watt
Question 17.
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A. 1200 m
B. 0.33 km
C. 3.33 km
D. 33 km
Ans: C. 3.33 km
Question 18.
Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.
A. 12500
B. 20
C. 40
D. 6250
Ans: B. 20
Question 19
Find the current (in A) when a charge of 1200C flows in 6 seconds.
A. 7200
B. 200
C. 100
D. 3600
Ans: B. 200
Question 20.
Safety fuse wire used in domestic electrical appliances is made of metal of low
A. Resistance
B. Melting point
C. Specific gravity
D. Conductance
Ans: B. Melting point
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-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
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- Physics MCQs Set-47
- Physics MCQs Set-48
- Physics MCQs Set-49
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- Physics MCQs Set-51
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- 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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