PhysicsJEE Main 8 Apr 2026, Shift 2·Q15·MCQ·Easy–moderate

Electromagnetic Induction · Inductance

A 30 cm long solenoid has 10 turns per cm and area of

5\ \mathrm{cm^2}

. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s. The e.m.f. induced in the coil is

\alpha\times10^{-5}

V. The value of

\alpha

is .

We corrected a printing error in the original paper

Source printed “varies from 2 A to 4 A is 3.14 s”; “The value $\alpha$ is”.

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