What is an ideal diode? a. The ideal diode acts as an open circuit for forward currents and as a short circuit with reverse voltage applied. b. The ideal diode acts as an open circuit regardless of forward voltage or reverse voltage applied. c. The ideal diode acts as a short circuit regardless of forward voltage or reverse voltage applied. d. The ideal diode acts as a short circuit for forward currents and as an open circuit with reverse voltage applie

d.  The ideal diode acts as a short circuit for forward currents and as an open circuit with reverse voltage applied.

Explanation:

Ideal diode acts like an ideal conductor. In case of forward voltage it acts like an ideal conductor. However when it is reverse biased then it behaves like an ideal insulator. You can understand it bu considering a switch. When the voltage is forward then ideal diode acts like a closed switch. When the voltage is reverse biased then ideal diode behaves like an open switch.

        That is why we can say that the ideal diode acts as a short circuit (higher conduction) for forward currents and as an open circuit ( zero conduction) with reverse voltage applied.