In which of the following circuits is the dio | vedclass

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(A) diode is in reverse bias when the potential at the cathode $(V_k)$ is higher than the potential at the anode $(V_a)$,i.e.,$V_k > V_a$.In option $A

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(A) diode is in reverse bias when the potential at the cathode $(V_k)$ is higher than the potential at the anode $(V_a)$,i.e.,$V_k > V_a$.In option $A$: $V_a = -12 \ V$,$V_k = -5 \ V$. Since $-5 \ V > -12 \ V$,the diode is in reverse bias.In option $B$: $V_a = 0 \ V$,$V_k = -10 \ V$. Since $0 \ V > -10 \ V$,the diode is in forward bias.In option $C$: $V_a = 0 \ V$,$V_k = 5 \ V$. Since $5 \ V > 0 \ V$,the diode is in reverse bias.In option $D$: $V_a = 5 \ V$,$V_k = 10 \ V$. Since $10 \ V > 5 \ V$,the diode is in reverse bias.Note: Based on the provided images,the question asks for the reverse bias condition. Options $A$,$C$,and $D$ all show reverse bias. However,in standard textbook problems of this type,usually only one option is intended to be correct. Re-evaluating the provided images: In $A$,$V_k > V_a$ (Reverse). In $B$,$V_a > V_k$ (Forward). In $C$,$V_k > V_a$ (Reverse). In $D$,$V_k > V_a$ (Reverse). Given the ambiguity,we identify the most standard representation of reverse bias where the cathode is at a higher potential than the anode.

In which of the following circuits is the diode in reverse bias?

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