Chapter 10, Problem 3TS

A radio speaker has a resistance of $8\Omega$ . Show that when $12\text{ V}$ is impressed across the speaker, the current is $1.5\text{ A}$ .

Solution

To determine: The current.

Answer:

The current is $1.5\text{A}$ .

Explanation:

Given info: The resistance is $8\Omega$ and the voltage is $12\text{V}$ .

According to Ohm’s law, write the expression for the voltage.

$V=IR$ $I=\frac{V}{R}$

Here,

$I$ is the current

$R$ is the resistance.

Substitute $8\Omega$ for $R$ and $12\text{V}$ for in the above expression to get $I$

$\begin{array}{c}I=\frac{12\text{V}}{8\Omega }\\ =1.5\text{A}\end{array}$

Conclusion:

Therefore, the current is $1.5\text{A}$ .