Question

62. (a) In the circuit below, suppose I,-4-M = 1 H and RL-1 ?. Assume the dot is in position A. Suppose /1(s)- expansions followed by i2(t) and v2(t). 2s-4) s(s* +4 Compute I,(s) and V,(s). Then compute their partial fraction 2 2 L1 L2 (b) In the circuit below, L-1H, L2-2 H, M-1 H, R -20 2, R-30 2, and the dot is in position B. (i) Find the coupling coefficient, k (ii) Find the impedance seen by the voltage source. (iii) If v.(t)- 50cos(10t)u(t) V, find the current from A to B through the top inductor.

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