Chapter 18, Problem 37P

To determine

The number of bulbs connected to $120volts$ .

Answer to Problem 37P

  $18Bulbs$

Explanation of Solution

Given info:

Voltage, $120V$

Current, $I=15A$

Power, $P=100W$

Formula used:

By the definition of the power,

  $P=VI$

Where, $V$ is voltage and $I$ is current.

Calculation:

By using the formula of power,

  $nP=VI$

Where, $V$ is voltage, $I$ is current and $n$ is the number of bulbs.

Now, substitute all the given values to calculate the number of bulbs:

  $\begin{array}{c}n=\frac{VI}{P}\\ =\frac{\left(15A\right)\left(120V\right)}{100W}\\ =18Bulbs\end{array}$

Conclusion: The number of bulbs: $18Bulbs$ .