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PhysicsJEE Main 6 Apr 2026, Shift 1·Q18·MCQ·Easy–moderate

Electromagnetic Induction · Inductance

An inductor of inductance 10 mH having resistance of 100 Ω100\ \Omega is connected to battery of E.M.F. 1.0 V through a switch as shown in the figure below. After switch is closed, the ratio of instantaneous induced emfs across the inductor when the current passing through it is 2 mA and 4 mA is .
  1. (1)4/3
  2. (2)3/4
  3. (3)5/3
  4. (4)3/5
We corrected a printing error in the original paper

Source printed “the ratio of instantaneous voltages across the inductor” (the terminal voltage of the resistive inductor equals the 1.0 V emf at all times, ratio 1); corrected to the intended “induced emfs” (L di/dtL\,di/dt: 0.8 V and 0.6 V).

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