Physics
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

The carpet is a better conductor of heat than the stone
The stone conveys the heat away from the feet more rapidly than the carpet
The human body maintains a constant temperature
The floor and carpet are at different temperatures

ANSWER DOWNLOAD EXAMIANS APP

Physics
In a conductor

The forbidden energy gap is very wide
The valence band and the conduction band overlap each other
There is no conduction band
The forbidden energy gap is very narrow

ANSWER DOWNLOAD EXAMIANS APP