1. Determine the current i(t) flowing through a load if the cumulative charge that has flowed through it up to time t is: a. q(t) = 4.3 μC b. q(t) =

4 cos(377t) mC c. q(t) = 1.5[1-e-0.25t 25tJnC d. q(t) = 0.2t sin(120nt) pC