Question

“I am very light and present in every matter.  When I move along the equator from east to west, I am pushed up. When I am stationary, no force”.

1. Name the force and write its expression.

2. Who am I?

3. What would happen if moved at the poles?

Answer 1

1. Lorentz force in earth’s magnetic field F =qvB

2. Electron

3. The earth’s magnetic field at poles is perpendicular to the earth surface. When an electron move, it is pushed to one side, parallel to earth’s surface.