Physics
The period of revolution of a geostationary satellite is

Changing continuously
365 days
30 days
24 hours

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why two thin shirts can keep us warmer than a single thick shirt in winter ?

No radiation of heat takes place
Air layer between two shirts works as good conductor
Air layer between two shirts behaves like insulating media
Two thin shirts become thicker so prevent transmission of heat

ANSWER DOWNLOAD EXAMIANS APP

Physics
In a conductor

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

ANSWER DOWNLOAD EXAMIANS APP