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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACFaraday law/Lenz lawEasy2 minPYQ_2020

PhysicsEasysingle choice

In a coil of area $10 {cm}^{2}$ and $10$ turns, magnetic field is directed perpendicular to the plane and is changing at a rate of $1 0^{4} T s^{- 1}$ . The resistance of the coil is $20 Ω$ . The current in the coil will be

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Answer:

Solution:

Induced current is,

$i = \frac{1}{R} (N \frac{dϕ}{dt}) = \frac{1}{R} (NA \frac{dB}{dt})$

$i = \frac{1}{20} (10) (10 \times 10^{- 4}) (10^{4}) = 5 A$

$i = 5 A$

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

⏱ 2mℹ️ Source: PYQ_2020

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