I (t ) =15 2 cos (2π 60t ) [A]

[XodoX]

A wire has a current given by
i (t ) =15 2 cos (2π 60t ) [A].
Determine how many electrons cross a particular point on the wire, moving from right to left, in
the time interval 0 < t < 0.001


I don't get this one. What equation do Ineed to use? I can't find the right one, but it seems so easy.
]

 

[tiny-tim]

A wire has a current given by
i (t ) =15 2 cos (2π 60t ) [A].
Determine how many electrons cross a particular point on the wire, moving from right to left, in
the time interval 0 < t < 0.001

Hi XodoX!

Hint: current = charge per time, so ∫(current)d(time) = charge

 

[XodoX]

I don't get it. Couldn't I just plug in the numbers and substract both equations?