Find the current in an LRC series circuit at t = 0.01s when L = 0.2H, R = 80, C = 12.5 x 10-³F, E(t) = 100sin10tV, q(0) = 5C, and i(0) = 0A.
Q.2 Verify that u = sinkctcoskx satisfies a2u/at2=c2 a2u/ax2