Physics
The oil in the wick of an oil lamp rises up due to:

Pressure difference
Gravitational force
Low viscosity of oil
Capillary action

ANSWER DOWNLOAD EXAMIANS APP

Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

Both suffer the same change in momentum
The rubber ball suffers greater change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball
The metal ball suffers greater change in momentum

ANSWER DOWNLOAD EXAMIANS APP

Physics
Energy in reflected light :

Decreases with the increase in angle of incidence
Does not depends on the angle of incidence
Increases with the increase in angle
Becomes maximum for angle of incidence equal to 45°

ANSWER DOWNLOAD EXAMIANS APP