Four diode connections are given below. Identify the diagram in which the diode is forward biased.
Choose the correct answer from the options given below.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B) and (D) only
Reason (B): Anode is at the +10 V side and cathode at +5 V side, so
$V_{anode}=+10\ \text{V} > V_{cathode}=+5\ \text{V}$ → diode forward biased.
Reason (D): Anode is connected (via R) to −5 V and cathode to −12 V, so
$V_{anode}=-5\ \text{V} > V_{cathode}=-12\ \text{V}$ → diode forward biased.