Question

1. If the current in a wire of a CD player is 5.00 mA, how long would it take for 2.00 C of charge to pass through a cross-sectional area of this wire?

Answer 1

The current is defined as:

`I=(Q)/(t)`

Plugging the values given and solving for t we have that:

`\begin{gathered} 5*10^(-3)=(2)/(t) \\ t=(2)/(5*10^(-3)) \\ t=400 \end{gathered}`

Therefore it will take 400 seconds.