Problem

The current in a wire varies with time according to the relation

i = (3.0 \text{ A}) + (2.0 \text{ A/s}) t

(a) How many coulombs of charge pass a cross-section of the wire in the time interval between

t = 0

and

t = 4.0 \text{ s}

? (b) What constant current would transport the same charge in the same time interval?