List of top Physics Questions asked in BITSAT

A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach the face BC if

A magnet of magnetic moment $20\, CGS$ units is freely suspended in a uniform magnetic field of intensity $0.3\, CGS$ units. The amount of work done in deflecting it by an angle of $30^\circ$ in $CGS$ units is