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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACFaraday law/Lenz lawEasy2 minPYQ_2016

PhysicsEasysingle choice

The magnetic flux in a closed circuit of resistance $10Ω$ varies with time as $ϕ = (2 t - 4 t^{2} + 1)$ . The current in the loop will change its direction after a time of

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Solution:

$e = - \frac{d ϕ}{dt} = [- 2 + 8 t + 0] \Rightarrow 8 t = 2 \Rightarrow t = \frac{1}{4} sec = 0.25 sec$

Stream:VITEEESubject:PhysicsTopic:EMI/ACSubtopic:Faraday law/Lenz law

⏱ 2mℹ️ Source: PYQ_2016

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