Physics
A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

< P
2P
> P
P

ANSWER DOWNLOAD EXAMIANS APP

Physics
Air moves from the region where the air ________

Pressure is low to the region where the pressure is high
Humidity is low to the region where the humidity is high
Pressure is high to the region where the pressure is low
Humidity is high to the region where the humidity is low

ANSWER DOWNLOAD EXAMIANS APP

Physics
When a piece of pure silicon is doped with aluminium, then

The conductivity of the doped silicon piece will remain the same
The doped silicon piece will become p-type
The doped silicon piece will become n-type
The resistivity of the doped silicon piece will increase

ANSWER DOWNLOAD EXAMIANS APP