Physics MCQ

 

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Physics MCQ

Question 1
Nuclear sizes are expressed in a unit named
A
Fermi
B
Angstrom
C
Newton
D
Tesla

Question 2
Inside an aeroplane, flying at a high altitude,
A
the pressure is the same as that outside.
B
normal atmospheric pressure is maintained by the use of air pumps.
C
the pressure inside is less than the pressure outside.
D
normal humidity and partial vacuum are maintained.

Question 3
Siphon will fail to work if:
A
The densities of the liquid in the two vessels are equal.
B
The level of the liquid in the two vessels are at the same height.
C
Both its limbs are of unequal length.
D
The temperature of the liquids in the two vessels are the same.

Question 4
Metals are good conductors of electricity because:
A
They contain free electrons.
B
The atoms are lightly packed.
C
They have high melting point.
D
All of the above.

Question 5
Rectifiers are used to convert:
A
Direct current to Alternating current
B
Alternating current to Direct current
C
High voltage to low voltage
D
Low voltage to high voltage

Question 6
One thousand microns is equal to
A
10$^{-3}$m
B
10$^{-6}$m
C
10$^{-9}$m
D
10$^{-12}$m

Question 7
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
A
The heating effect of current alone
B
Hysteresis loss alone
C
Both the heating effect of current and hysteresis loss
D
Intense sunlight at noon

Question 8
In which of the following industries is mica as a raw material?
A
Cement
B
Glass and Pottery
C
Iron and Steel
D
Electrical

Question 9
Light travels at the fastest speed in:
A
glass
B
water
C
hydrogen
D
vacuum

Question 10
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
A
Water, iron and air
B
Iron, air and water
C
Air, water and iron
D
Iron, water and air
There are 10 questions to complete.

 

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