In a P-N junction,avalanche current flows in | vedclass

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(B) In a $P-N$ junction,when the diode is reverse-biased,the depletion layer widens. As the reverse voltage increases,the electric field across the ju

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(B) In a $P-N$ junction,when the diode is reverse-biased,the depletion layer widens. As the reverse voltage increases,the electric field across the junction becomes very strong. This strong electric field accelerates the minority charge carriers to high velocities,which collide with atoms and knock out more electrons through ionization. This process is cumulative and leads to a sudden,large increase in current,known as avalanche current. Therefore,avalanche current flows during reverse biasing.

In a $P-N$ junction,avalanche current flows in the circuit when the biasing is:

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