Chapter 22.1, Problem 1PP

To determine

Electrical power used by lamp.

Answer to Problem 1PP

  $P=24\text{W}$

Explanation of Solution

Given:

Battery voltage, $V=12\text{V}$

Current produced, $I=2\text{A}$

Formula Used:

The electrical power is given as,

  $P=VI$

Where, $P$ is electrical power, $V$ is applied voltage and $I$ is current produced.

Calculation:

On substituting the given values in above relation,

  $\begin{array}{c}P=12\times 2\\ =24\text{W}\end{array}$

Conclusion:

Therefore, the power used by lamp is $P=24\text{W}$ .