The magnitude of earth’s magnetic field is about 0.5 gauss near earth’s surface. what’s the maximum possible magnetic force on an electron with kinetic energy of 1 kev? compare with the gravitational force on the electron.

this force is times more than the gravitational force

Explanation:

Kinetic Energy of the electron is given as

now the speed of electron is given as

now we have

now the maximum force due to magnetic field is given as

Now if this force is compared by the gravitational force on the electron then it is

so this force is times more than the gravitational force

newton's first law of motion