Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Siphon will fail to work if:
Radiocarbon is produced in the atmosphere as a result of
Rectifiers are used to convert:
Pa(Pascal) is the unit for
Metals are good conductors of electricity because:
Nuclear sizes are expressed in a unit named
Planets do not twinkle because
Light from the Sun reaches us in nearly
Pick out the scalar quantity
Stars appears to move from east to west because
The absorption of ink by blotting paper involves: