Physics

A particle is moving in a straight line with velocity (v) = (t – 4) m/s. What is the average speed between t = 0 to t = 8 second?

The displacement wave in a string is given as y = 5sin(62.8x – 157t). Here y and x are in cm and t in second. The wavelength of the wave is

A man is swimming with speed 10 km/h in still water crosses a river of width 1 km along the shortest path in 10 minutes. The velocity of river flow is

In an isobaric process, the absolute temperature is doubled. The mean free path (l) and the  relaxation time (t) will become respectively

If then angle between A and B will be

The potential energy of a particle varies with x according to the relation U(x) = x² – 4x. The point x = 2 is a point of

Who discovered the concept of photon?

A proton is revolving in a circular path with constant speed. Angle between angular momentum and magnetic dipole  moment associated with it is

Are photons always in motion?

A square loop of side l is placed at a separation a with a very long wire AB, in same plane. If the current through BA is increasing in the direction shown, the induced current produced in the loop is