A voltage source is used to charge an automotive battery as shown in Figure P9.65(a). At t = t1, the protective circuitry of the source causes switch S1 to close, and the source voltage goes to zero. Find the currents IS , IB, and ISW for the following conditions:
a. t = t ? 1
b. t = t + 1
c. What will happen to the battery after the switch closes?
Now we are going to charge the battery, using the circuit of Figure P9.65(b). Repeat parts a and b if the diode has an offset voltage of 0.6 V. 
Analysis:
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