Example 5.29 A voltage e(t) is applied to the primary circuit at time t = 0, and mutual induction M drives the current i2(t) in the secondary circuit of Figure 5.10. If, prior to closing the switch, the currents in both circuits are zero, determine the induced current i(t) in the secondary circuit at time when R = 4 92, R = 10 2, L = 2 H, L = 8 H, M=2 H and e(t) = 28 sin 2r V. 1=0 R R e(t) 4(0) L 12(1) M