(i) Name two important processes that occur during the formation of a p-n junction. (ii) Draw the circuit diagram of a full wave rectifier along with the input and output waveforms. Briefly explain how the output voltage/current is unidirectional.

Question

Philoid · Accepted Answer

(i) The two important processes that occur during the formation of a p-n junction are diffusion and drift.

Full wave rectifier:

Input and output waveforms:

The ac to be transformed is connected across the primary of the transformer. In the first half of a cycle, let P₁>0 and P₂<0. So, in secondary coil, S₁>0 and S₂<0. As a result, the diode D₁ will be forward biased, and hence it will conduct. The current flows through D₁ and from X to Y through R_L and we get an output. In this cycle, the diode D₂ does not conduct as it is reverse biased. Similarly in the second half of the cycle, D₁ does not conduct but D₂ conducts. However, current flows from X to Y again. So, current flows in one direction in the entire process.

(i) Name two important processes that occur during the formation of a p-n junction.(ii) Draw the circuit diagram of a full wave rectifier along with the input and output waveforms. Briefly explain how the output voltage/current is unidirectional.

(i) Name two important processes that occur during the formation of a p-n junction.
(ii) Draw the circuit diagram of a full wave rectifier along with the input and output waveforms. Briefly explain how the output voltage/current is unidirectional.