Answer to Question #313301 in Physics for Joie

Question

A steadu current of 2.0 A flows in a wire for 16.0s (a) How many coulombsof a charge flow

through the wire? (b) How many electrons flow through the wire for the given time interval?

Answer 1

(a) How many coulombsof a charge flow through the wire?

$$q=It\\ =\rm 2.0\: A\times 16\: s=32\: C$$

(b) How many electrons flow through the wire for the given time interval?

$$N=\frac{q}{e}\\ =\frac{32}{1.6\times 10^{-19}}=2.0\times 10^{20}$$