CBSE Class 12 Physics — Semiconductor Electronics: Materials, Devices and Simple Circuits

In an unbiased p-n junction, at equilibrium, which of the following statements is true?

An ac voltage $V_i = 12 \sin (100\pi t)$ V is applied between points A and B in a network of two ideal diodes and three resistors as shown in figure. During the positive half-cycle of the input voltage V_i supplied to the network. (a) Identify which of the two diodes will conduct and why? (b) Redraw an equivalent circuit diagram to show the flow of current. (c) Calculate the output voltage drops V_0 across the three resistors when the input voltage attains its peak value.

Briefly explain the two important processes that occur during the formation of a p-n junction.