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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACFaraday law/Lenz lawEasy2 minPYQ_2020

PhysicsEasysingle choice

A coil of circular cross-section having $1000$ turns and $4 {cm}^{2}$ face area is placed with its axis parallel to a magnetic field which decreases by $10^{- 2} Wb m^{- 2}$ in $0.01 s$ . The e.m.f. induced in the coil is :

Options:

Answer:

Solution:

As we know, $ϕ = \vec{B} \cdot \vec{A}$

Induced emf $(e)$ = $- \frac{d ϕ}{d t} = - N . A \frac{d B}{d t}$

$= 1000 \times 4 \times 1 0^{- 4} \times 1$
$= 400 mV$

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

⏱ 2mℹ️ Source: PYQ_2020

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