At what height the gravitationa field reduces by `75%` of the gravitational field at the surface of earth?

At what height the gravitational field reduces by 75 % the gravitational field at the surface of earth ?

At what height the gravitational field reduces by 75 % the gravitational field at the surface of earth ?

The height above the surface of earth at which the gravitational filed intensity is reduced to 1% of its value on the surface of earth is

The height above the surface of earth at which the gravitational filed intensity is reduced to 1% of its value on the surface of earth is

Where is the gravitational field zero and where is the gravitational potential zero, in case of Earth?

What is the strength of earth's magnetic field at the surface of earth?

The intensity of the gravitational field of the earth is maximum at