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JEE Main 2026 (22 Jan, Shift 2) · Units & Dimensions

Units & Dimensions question from JEE Main 2026 (22 Jan, Shift 2)

Q2JEE Main 2026 · 22 JAN · SHIFT 2Easy

Units & Dimensions

If ϵ,E\epsilon, E and tt represent the free space permittivity, electric field and time respectively, then the unit of ϵEt\frac{\epsilon E}{t} will be:

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Answer: (c)

  1. Displacement current Id=ϵdΦEdt=ϵAdEdtI_d = \epsilon \frac{d\Phi_E}{dt} = \epsilon A \frac{dE}{dt}.
  2. So ϵEt\frac{\epsilon E}{t} has the unit of IdA\frac{I_d}{A}, current per unit area.
  3. So the answer is (c) A/m2\text{A/m}^2.
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