Diode V-I Characteristic Curve Steps:

• Recall that a semiconductor diode allows current in forward bias (V > 0) with exponential increase after threshold (~0.7V for silicon), and negligible current in reverse bias (V < 0) until breakdown.
• Examine graphs: look for asymmetry with sharp forward rise and flat reverse line near zero current.
• Eliminate symmetric or linear graphs, as diodes are non-ohmic and rectifying.
• Select the graph matching forward exponential growth and reverse blocking.

Why B is correct:

• Matches Shockley equation I = I_s (e^(V/(n V_T)) - 1), showing exponential forward current and near-zero reverse current.

Why the others are wrong:

• A: Linear through origin indicates ohmic resistor, not diode rectification.
• C: Symmetric curve suggests ideal AC conductor, ignoring diode polarity.
• D: Sharp breakdown in both directions lacks diode's one-way conduction.

Final answer: B