Chapter 1, Problem 1P

If the current in an electric conductor is 2.4 A, how many coulombs of charge pass any point in a 30-second interval?

To determine

The coulombs of the charge pass any point in a $30$ -second interval.

Answer to Problem 1P

The charge passes any point in a $30$ -second interval is $72\text{ C}$.

Explanation of Solution

Given:

The current is $2.4\text{ A}$.

The time is $30\text{ s}$.

Concept used:

Write the expression for the charge.

  $Q=It$   ...... (1)

Here, $Q$ is the charge, $I$ is the current and $t$ is the time.

Calculation:

Substitute $2.4\text{ A}$ for $I$ and $30\text{ s}$ for $t$ in equation (1).

  $\begin{array}{c}Q=\left(2.4\text{ A}\right)\left(30\text{ s}\right)\\ =72\text{ C}\end{array}$

Conclusion:

Thus, the charge pass any point in a $30$ -second interval is $72\text{ C}$.