Question

A current of 1.5A flows through an electric toothbrush for 78 seconds. How much charge hasflowed through the toothbrush during that time?

Answer 1

The current is defined as:

`i=(Q)/(t)`

where Q is the charge and t is the time. In this case we know that the current is 1.5 A and the time is 78 s; plugging these values and solving for Q we have:

`\begin{gathered} 1.5=(Q)/(78) \\ Q=78(1.5) \\ Q=117 \end{gathered}`

Therefore, the charge that flowed through the toothbrush is 117 C