Question

The current in a wire varies with time according to the equation i=4-2t​... Calculate average current

Answer 1

Answer:

Can't be predicted. Think twice before asking something!

Explanation:

I = 4 - 2t , tells you magnitude and direction of the current at different times, but the idea of average current is that the total charge passed through a given time interval. here since time interval is not given hence we cannot figure out the average current. Actually the idea of average current is useless without mentioning the time interval.

For ur extra knowledge, Time average of any quantity is given by, here i is some quantity which can be expressed as the time derivative of some other quantity ( say, charge in case of current)

$i_{avg} = \frac{\int\limits^t_0 {i} \, dt}{\int\limits^t_0 \,dx }$