A 2 V battery is connected across A-B in the shown ideal-diode/resistor network. Find the battery current when the positive terminal is connected (i) to A and (ii) to B. Image
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Question

A 2 V battery is connected across A-B in the shown ideal-diode/resistor network. Find the battery current when the positive terminal is connected (i) to A and (ii) to B. Image

G1 Physics · Accepted Answer

For each battery polarity, determine which diode is forward biased and replace it by a short; the other diode is open. The equivalent resistance gives source currents 0.4 A and 0.2 A, respectively. Correct answer: B.