Question

When a $p-n$ junction diode is connected in forward bias its barrier potential

• A. decreases and less current flows in the circuit
• B. decreases and more current flows in the circuit
• C. increases and more current flows in the circuit
• D. decreases and no current flows in the circuit

Answer 1

Answer: (B)

When $p-n$ junction diode is forward biased, more number of charge carriers (electrons in n-side and holes in $p$-side) moves through the junction. Therefore, in forward biasing barrier potential is reduced. Thus, increasing the current in the circuit.