Question

A diode is connected in parallel with a resistance as shown in the figure. The most probable current (I)–voltage (V) characteristic is 

• A. Option a
• B. Option b
• C. Option c
• D. Option d

Hint:

Parallel diode-resistor: Reverse bias ⇒ resistor dominates. Forward bias ⇒ diode dominates.

Answer 1

The Correct Option is B

Concept:
Parallel combination:
- Resistor gives linear I–V relation.
- Diode gives exponential current in forward bias.

Step 1: Forward bias (positive V)
Diode conducts strongly ⇒ exponential rise.

Step 2: Reverse bias (negative V)
Diode blocks current ⇒ only resistor conducts ⇒ linear I–V.

Step 3: Resulting graph
- Linear in negative region
- Exponential in positive region
Matches option (B).