Physics
A mirage occurs because of

Diffraction of light
Total internal reflection by layers of air
Reflection by hot ground
Interference of light

ANSWER DOWNLOAD EXAMIANS APP

Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Decreasing the radius of the capillary tube
None of these
Increasing the radius of the capillary tube
Increasing the height of water in the vessel

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

ANSWER DOWNLOAD EXAMIANS APP