How many electrons must be transferred to a body to produce a charge of 125 nc?

given:

charge to be produced = 125 nc or 125*10^-9 c.

to find:

Number of electrons required to produce a charge of 125 nc.

solution:

the charge of an electron is 1.602 x 10^-19 C:

Then, number of electrons = 125 x 10^-9 / (1.602 x 10^-19)

= 78 x 10 ^ 10 electrons

so, 78 x 10^10 electrons must be transferred to a body to produce a charge of 125nc.