18 Circuit va'iabtes b) Given that the current is due to electron flow, state whether the electrons are entering or leav- ing terminal2.c) Do the electrons gain or lose energy as they passthmugh the element in the box?1.14 Repeat Problem 1.13 with a voltage of 60V. 1.15 Wlen a car has a dead battery it can often be startedby connecting the battery from another car across its terminals. The posilive terminals are connectedtogether as are the negative terminals. The connec- tion is illustrated in Fig. P1.l5. Assume the crment iin Fig. P1.15 is measued and found to be 30 A.a) Which car has the dead battery?b) If this connection is maintained for 1 min, howmuch energy is transferred to the deadbattery'?Figure P1.15 1,17 The voltage and current at th€ t€rminals of the circuit element in Fig. 1.5 are zero lor , < 0. For , > 0 they are?) = e s00, ?-1500! v,i : 30 40e 56'+ 10e-1s00i mAa) Find the power at r - 1 ms.
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