How many electrons must be transferred to an uncharged body for its electric charge to become

How many electrons must be transferred to an uncharged body for its electric charge to become equal to q = -1.28 • 10 ^ -11 C?

To find the number of electrons that have passed to an uncharged body, we use the formula: Q = n * qe, whence we express: n = Q / qe.

Values of variables and constants: Q – the charge that the uncharged body has acquired (Q = -1.28 * 10 ^ -11 C); qе – electron charge (qе = -1.6 * 10 ^ -19 C).

Let’s make a calculation: n = Q / qe = -1.28 * 10 ^ -11 / (-1.6 * 10 ^ -19) = 80 * 10 ^ 6 electrons.

Answer: An uncharged body needs to transfer 80 * 10 ^ 6 electrons.