Question

Which of the following circuits represents a forward biased diode?

• A. (B), (D) and (E) only
• B. (A) and (D) only
• C. (B), (C) and (E) only
• D. (C) and (E) only

Hint:

For a diode to be forward biased, the anode must be at a higher potential than the cathode, allowing current to flow through the diode.

Answer 1

The Correct Option is C

To identify forward-biased diode circuits, one must grasp diode behavior. A diode is forward-biased when its anode (positive terminal) is at a higher potential than its cathode (negative terminal), enabling current flow.

Let's examine the given choices:

1. Option (B): Ascertain if the anode voltage exceeds the cathode voltage in this circuit. If confirmed, the diode is forward-biased.
2. Option (C): Likewise, determine if the circuit meets the anode-at-higher-voltage condition for forward biasing.
3. Option (E): Re-inspect the circuit points and voltages to confirm the anode is positively biased relative to the cathode.

Analysis of the voltage potentials in the original problem's circuits reveals that diodes in options (B), (C), and (E) are indeed forward-biased.

Consequently, the correct selection comprises: (B), (C), and (E) exclusively.