Series rlc circuit (l = 340 ×10-3 h, c = 25 ×10-6 f, and r = 280 ohms) has an ac generator with amplitude εmax = 120 v and unknown frequency f. at time t = 0, the following voltages are measured: vad = va - vd = + 120 v, vbc = vb - vc = -10.1 v, and vcd = vc - vd = + 60.6 v. what is timax, the first time after t = 0 that the current in the circuit attains its maximum value? timax =