What are called conductors and non-conductors ? In which free electrons are more ? Conductor or non-conductor.

Which of the following is not true about electric charge?

Discuss the historical observation of frictional electrics.

Why only electron can transfer from one body to another body in frictional electrics ?

Find change in mass of a body if it is given $+2C$ charge.

When a body is earth connected, electrons from the earth flow into the body. This means the body is…..