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Concepts Of Physics MCQ Edition [Volume 2]PhysicsSemiconductors and Semiconductor Devices

As illustrated in the figure, two identical p - n junctions can be connected in series with a battery in three different ways. The potential difference across the two p - n junctions is equal in

Options

  1. Acircuit 2 and circuit 3
  2. Bcircuit 1 and circuit 2
  3. Ccircuit 3 and circuit 1
  4. Dcircuit 1 only

Correct answer

A. circuit 2 and circuit 3

Step-by-step solution

In the given circuits, the longer line of the battery symbol represents the positive terminal and the shorter, thicker line represents the negative terminal. Thus, the left side of each circuit is connected to the positive terminal and the right side to the negative terminal. Let us analyze the biasing of the p - n junctions in each circuit: In Circuit 1, the left p - n junction has its p -side connected to the positive terminal, making it forward-biased. The right junction has its p -side connected to the negative

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