The voltage and current at the terminals of the circuit element in the figure are zero for t < 0.
For t >= 0 they are
v= 65- 65e^(-1000t) V
– +—> i (goes into terminal 1)
Total energy delivered= ?
P=v i. Multiple them together, take the derivative and set it equat to zero. Then solve for P. In your case, by inspection, we know that v and i are at their maximum values at t=0. vmax=65, imax=.030 Pmax=1.95 watts.
properly bear in mind the place skill element got here from. For AC circuit P=IVcostheta, the place the importance of cos theta is the skill element. on the grounds that cosine varies from -a million to a million, the skill element varies from 0 to a million.