Question

Which of the following is not associated with P-N junction?
(A) Charge storage capacitance.
(B) Junction capacitance
(C) Depletion capacitance
(D) Electric field channel inductance

Answer 1

Hint
The junction capacitance is also referred to as charge storage capacitance and depletion capacitance. It is formed when a P-N junction diode is in reverse biased condition. Here, electric field channel inductance is not associated with P-N junction diodes.

Complete step by step answer
A P-N junction diode is a two-terminal semiconductor device that of P-type and N-type semiconductor materials. It is connected in an electric circuit to control the amount of current passing through the circuit. A P_N junction diode is in a reverse-biased condition when the n-region is connected to the positive terminal of the battery and the p-region is connected to the negative terminal of the battery as shown in the figure.

The holes present in the p-region of the diode get drawn towards the n-region across the junction and the free electrons in the n-region get drawn towards the p-region across the junction. This results in the formation of the depletion region at the intersection. When voltage is applied across the diode; the two regions having low resistances act like plates of a capacitor and the depletion region acts as a dielectric. The depletion region thus allows the storage of charges i.e. negative and positive ions. This capacitance at the depletion region is termed as junction capacitance.
Therefore, (D) Electric field channel inductance is the correct answer.

Additional Information
A P-N junction diode is in a forward-biased condition when the p-region is connected to the positive terminal of the battery and the n-region is connected to the negative terminal of the battery.

Note
Two types of capacitance take place in a P-N junction diode. While junction capacitance occurs in the reverse biased condition of a diode, the capacitance that occurs in forward biased condition of a P-N junction diode is called diffusion capacitance. These two must not be confused with each other.