Nuclear sizes are expressed in a unit named
Inside an aeroplane, flying at a high altitude,
the pressure is the same as that outside.
normal atmospheric pressure is maintained by the use of air pumps.
the pressure inside is less than the pressure outside.
normal humidity and partial vacuum are maintained.
Siphon will fail to work if:
The densities of the liquid in the two vessels are equal.
The level of the liquid in the two vessels are at the same height.
Both its limbs are of unequal length.
The temperature of the liquids in the two vessels are the same.
Metals are good conductors of electricity because:
They contain free electrons.
The atoms are lightly packed.
They have high melting point.
All of the above.
Rectifiers are used to convert:
Direct current to Alternating current
Alternating current to Direct current
High voltage to low voltage
Low voltage to high voltage
One thousand microns is equal to
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
The heating effect of current alone
Hysteresis loss alone
Both the heating effect of current and hysteresis loss
Intense sunlight at noon
In which of the following industries is mica as a raw material?
Glass and Pottery
Iron and Steel
Light travels at the fastest speed in:
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Water, iron and air
Iron, air and water
Air, water and iron
Iron, water and air
There are 10 questions to complete.