Question

In the US, the conventional voltage seen in a recepticle (wall outlet) is 120 V. How many amperes is required to run a stereo that has a resistance of 494 capital omega ?

Answer 1

Given that the voltage is V = 120 V

The resistance is

`R\text{ =494 }\Omega`

We have to find the current.

Current in the circuit can be calculated by the formula,

`I=(V)/(R)`

Substituting the values, the current will be

`\begin{gathered} I=(120)/(494) \\ =0.24\text{ A} \end{gathered}`