Question

A Si and a Ge diode has identical physical dimensions. The band gap in Si is larger than that in Ge. An identical reverse bias is applied across the diodes

• A. The reverse current in Ge is larger than that in Si
• B. The reverse current in Si is larger than that in Ge
• C. The reverse current is identical in the two diodes
• D. The relative magnitude of the reverse currents cannot be determined from the given data only

Answer 1

The correct option is C The reverse current is identical in the two diodes

When a diode is reverse biased, then the applied voltage supports the barrier voltage. Due to it, the reverse current is weak. It will be identical in two diodes.