First slide
Faraday's law of Electromagnetic induction
Question

The magnetic flux linked with a coil at any instant t is given by ϕ=5t3100t+300, the e.m.f. induced in the coil at t = 2 s is

Moderate
Solution

e=dt=ddt5t3100t+300=15t2100

At t = 2 s,

e = 40 V

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