Verified Solution • 2025–26 Session moderate

QPages 417-418: Q7: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Pages 417-418: Q7 Solution: If the two ends of a p-n junction are joined by a wire,

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often treat a shorted p‑n junction as a simple resistor and expect a continuous current, overlooking the internal built‑in electric field that quickly restores equilibrium; only a brief transient flows, after which the depletion barrier prevents any steady external current.

If the two ends of a p-n junction are joined by a wire,

Multiple Choice Options

  • A there will not be a steady current in the circuit
  • B there will be a steady current from the n-side to the p-side
  • C there will a steady current from the p-side to the n-side
  • D there may or may not be a current depending upon the resistance of the connecting wire

Step-by-Step Verified Solution

**Answer:** (a) there will not be a steady current in the circuit. **Step-by-Step Explanation:** When the two ends of a p-n junction are joined by a wire, no steady current flows because the potential barrier prevents it.

All Questions in this Chapter

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