Physics Questions

An earthquake of magnitude 6 on Richter scale has ______________ times more destructive energy than an earthquake of magnitude 4.

In a transformer the tappings are generally provided on

If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become ___.

As a sailor jumps in the forward direction, the boat moves backwards. This example illustrates Newton's :

A person holding a pen in his left hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is half as that of earth is _________________.

The reflection formed by the plane mirror is ________________.

A body has a weight W on the surface of Earth. What is its weight on a planet whose mass is 15 times that of Earth and a radius that is 4 times that of the earth?