# Physics MCQ

## 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.