Aplate carries a charge of 3.8 uc, while a rod carries a charge of 1.9 c. how many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

Explanation:

The total charge is distributed over the two objects:

The plate and the rod must have . So the charge transferred from the plate to the rod is:

Number of electrons:

reserve is the answer

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach