Chapter 6.3, Problem 18PP

To determine

To calculate: Voltage difference supplied by the batteries.

Answer to Problem 18PP

Voltage difference supplied by the batteries is $\underset{\_}{\text{3 V}}$ .

Explanation of Solution

Given:

Power = $\text{2}\text{.4 W}$

Current = $\text{0}\text{.8 A}$

Formula used:

Power is given by,

  $P=IV$

where $I$ is current and $V$ is voltage difference.

Calculation:

Voltage difference is calculated as:

  $\begin{array}{l}P=IV\\ V=\frac{P}{I}\\ =\frac{\text{2}\text{.4 W}}{\text{0}\text{.8 A}}\\ =3\text{ V}\end{array}$

Conclusion:

Voltage difference supplied by the batteries is $\underset{\_}{\text{3 V}}$ .