The magnetic flux linked with a coil (in $Wb$ ) is given by the equation $ϕ = 5 t^{2} + 3 t + 16$ . The magnitude of induced emf in the coil at the fourth second will be:
NEET 2020 (Phase 2)

Question

The magnetic flux linked with a coil (in Wb ) is given by the equation ϕ = 5 t 2 + 3 t + 16 . The magnitude of induced emf in the coil at the fourth second will be: NEET 2020 (Phase 2)

TestHub · Accepted Answer

Given magnetic flux in terms of time, ϕ = 5 t 2 + 3 t + 60 , and we know that from Faraday's law of electromagnetic induction, rate of change of flux is directly related to induced EMF of the coil, ⇒ | ε | = d ϕ d t = 10 t + 3 At t = 4 s , | ε | = 40 + 3 = 43 V

Physics - EMI/AC Question with Solution | TestHub

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