Question

In reverse bias, pn-junction diode depletion layer width:

• A. decreases
• B. increases
• C. remains same
• D. can't predict

Answer 1

Answer: (B)

increases

In reverse biasing, the positive terminal of the battery is connected to the n-type whereas the negative terminal is connected to the p-type junction. So the positive terminal tend to pull the electrons (near to the depletion layer) in n-type towards itself whereas the negative terminal pulls the holes towards itself which results in increase in the width of depletion layer.