Question

A plastic rod with an initial charge of +75 nC is brought into contact with a metal sphere with an initial charge of – 25 nC. After the plastic rod has touched the metal sphere, the rod has a charge of +60 nC and the sphere has a charge of -10 nC. How many electrons moved from the sphere to the rod when they were in contact?

Answer 1

Answer:

Explanation:

here u can see that there is a transfer of net 15 nC charge and we know that

Q=ne

15 * 10^-9 C=n*(1.6*10^-19)

n=15*10^-9/1.6*10^-19

n=9375*10^7