Verified Solution • 2025–26 Session moderate

QPages 417-418: Q11: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Pages 417-418: Q11 Solution: Two identical p-n junction may be connected in series with a…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often treat identical p‑n junctions like equal resistors and assume the battery voltage splits evenly in any series arrangement; however, a reverse‑biased diode presents a very high resistance, so the whole voltage appears across it while the forward‑biased diode sees only its small turn‑on voltage. Equal potential drops occur only when both junctions are biased in the same direction.

Two identical p-n junction may be connected in series with a battery in three ways. The potential difference across the two p-n junctions are equal in

Multiple Choice Options

  • A circuit 1 and circuit 2
  • B circuit 2 and circuit 3
  • C circuit 3 and circuit 1
  • D circuit 1 only.

Step-by-Step Verified Solution

**Answer:** (a) circuit 1 and circuit 2. **Step-by-Step Explanation:** In circuits 1 and 2, the two junctions are in parallel or symmetric, so the potential differences are equal.

All Questions in this Chapter

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