Question

Which of the following circuits is reverse-biased?

• A.
• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is D

To identify the reverse-biased circuit, it is necessary to define reverse biasing for a diode within an electrical circuit.

• A diode is reverse-biased when the cathode (negative terminal) exhibits a higher voltage than the anode (positive terminal). This condition obstructs current flow through the diode.
• Conversely, a diode is forward-biased when the anode voltage exceeds the cathode voltage, facilitating current passage.

Based on this analysis, only Circuit 4 features a reverse-biased diode. Therefore, the correct conclusion is:

This conclusion is derived from the core principles of diode functionality regarding forward and reverse biasing. In a reverse-biased state, voltage orientation across the diode prohibits current flow.