Physics Circle home Student Login

Home›Chapters›Electromagnetic Waves PYQs›Displacement Current, Maxwell's Equations & Production›Question 6

JEE Main 2025 (22 Jan, Shift 2) · Displacement Current, Maxwell's Equations & Production

Displacement Current, Maxwell's Equations & Production question from JEE Main 2025 (22 Jan, Shift 2)

Q6JEE Main 2025 · 22 JAN · SHIFT 2Difficult

Displacement Current, Maxwell's Equations & Production

A parallel plate capacitor of area A=16 cm2A = 16\text{ cm}^{2} and separation between the plates 10 cm, is charged by a DC current. Consider a hypothetical plane surface of area A0=3.2 cm2\text{A}_0 = 3.2\text{ cm}^{2} inside the capacitor and parallel to the plates. At an instant, the current through the circuit is 6A. At the same instant the displacement current through A0\text{A}_0 is __________ mA.

Numerical answer type. Work it out, then open the answer.

Show answer and solution

Answer: 1200

  1. Inside the capacitor the displacement current equals the circuit current, 6 A, spread uniformly over the plate area AA.
  2. Through area A0A_0: Id=6×A0A=6×3.216=1.2I_d = 6 \times \dfrac{A_0}{A} = 6 \times \dfrac{3.2}{16} = 1.2 A.
  3. Answer: 1200 mA.
Report a mistake

More questions on Displacement Current, Maxwell's Equations & Production