Q129 / 180 · COMEDK 2020 · Physics

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

A
decreases and less current flows in the circuit
Correct answer
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

Solution

When a $p-n$ junction diode is connected in forward bias, then its potential barrier decreases because more number of charge carriers (electrons in $n$-side and holes in $p$-side) move through the junction. Due to increase of drifting of charge carriers, electric current is increased.

Hence, the correct answer is option: 'B'.

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