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PhysicsEMI/ACFaraday law/Lenz lawMedium2 minQB

PhysicsMediumsingle choice

The flux linked with a coil at any instant 't' is given by $ϕ = 10 t^{2} - 50 t + 250$ . The induced emf at $t = 3 s$ is :-

Answer:

Solution:

$ε = - \frac{d ϕ}{d t} = - (20 t - 50) = 50 - 20 t$ .

At $t = 3$ s: $ε = 50 - 60 = - 10$ V. Answer: C

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

⏱ 2mℹ️ Source: QB

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