In Fig. \( \quad \), assuming the diodes to be ideal, (a) \( \mathr...

In Fig. \( \quad \), assuming the diodes to be ideal,
(a) \( \mathrm{D}_{1} \) is forward biased and \( \mathrm{D}_{2} \) is reverse biased and hence current
\( \mathrm{P} \) flows from A to \( B \)

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(b) \( \mathrm{D}_{2} \) is forward biased and \( \mathrm{D}_{1} \) is reverse biased and hence no current flows from \( \mathrm{B} \) to \( \mathrm{A} \) and vice versa.
(c) \( \mathrm{D}_{1} \) and \( \mathrm{D}_{2} \) are both forward biased and hence current flows from \( \mathrm{A} \) to \( \mathrm{B} \).
(d) \( \mathrm{D}_{1} \) and \( \mathrm{D}_{2} \) are both reverse biased and hence no current flows from \( A \) to \( B \) and vice versa.