Question

In how much time should an electric charge of 10 C flow between two terminals in a circuit to maintain a constant electric current of $100$ A ?

(A) $\frac{1}{10}\text{s}$

(B) $10\text{s}$

(C) $110\text{s}$

(D) $\frac{1}{110}\text{s}$
[1 Mark]

Answer 1

Electric current $\left(I\right)$ is the rate of flow of electric charge $\left(q\right)$ through a cross section per unit time $\left(t\right)$.
$I=\frac{q}{t}$
Given:
$q=10\text{C}$, $I=100\text{A}$

$t=\frac{q}{I}$

$t=\frac{10\text{C}}{100\text{A}}$

$t=\frac{1}{10}\text{s}$

Hence option A is correct.

[1 Mark]