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
Rainbow is due to

ionisation of water deposits
absorption of sunlight in minute water droplets
diffusion of sunlight through water droplets
refraction and reflection of sunlight by water droplets

ANSWER DOWNLOAD EXAMIANS APP