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QPage 339: Q2: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Waves Page 339: Q2 Solution: Displacement current goes through the gap between the plates of …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often think displacement current only flows when the capacitor charge rises, but the displacement current is proportional to the time derivative of the electric field, so a decreasing charge also changes the field and produces displacement current. Remember that $I_D=varepsilon_0, rac{dPhi_E}{dt}$, which is nonzero whenever $ rac{dQ}{dt} eq0$, regardless of the sign.

Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor

Multiple Choice Options

  • A increases
  • B decreases
  • C does not change
  • D is zero

Step-by-Step Verified Solution

**Answer:** (a), (b). **Step-by-Step Explanation:** Displacement current exists when the charge on the capacitor is changing (increasing or decreasing).

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