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3 3 c(t) =eu(t)+etu() | 可 e-3tu(t) The unit impulse response of a linear system is given by c(t) = e'u(t) +e-u(t). When the same system is subjected to an input of e-3tu(t), determine the output of the system. Assume that the system is initially relaxed. Iele Elolr e (@g) An insulating material specimen is connected to arm AB of a Schering bridge. The arm BC has a non-inductive resistance R2 of 140 Ω and arm CD has a non-inductive resistance R4 of 208 Q in parallel with a capacitor C4 of 0.5 μF (loss-free). The arm DA has a loss-free capacitor C3 of 150 x10-6 μF. If the C, then draw a neat circuit diagram of the bridge and derive the balance condition of the bridge, and calculate the parameters Ci, 71 of the specimen and its loss angle (8). URC-B-ELTE/43 7 Den h(l)LeK r(）hh () Show that the fault current for a single line to ground fault at the terminals of an alternator with solidly grounded neutral is more than that for symmetrical three-phase short circuit. The alternator has sequence reactances X1, X2 and Xo such that X1 = X2 >> Xo·