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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACInduced Electric FieldMedium2 minPYQ_2017

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In a coil of resistance $100 Ω$ , a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is:

Question diagram: In a coil of resistance 100 Ω , a current is induced by chan

Options:

Answer:

D

Solution:

$E m f = i R \Rightarrow - \frac{d ϕ}{d t} = i R$

$\int (- d ϕ) = \int (i d t) R$

$q = \frac{Δ ϕ}{R} = Area under i - t graph$

$\Rightarrow ∆ ϕ = (\frac{1}{2} \times 10 \times 0.5) \times 100 = 250 Wb$

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Induced Electric Field

⏱ 2mℹ️ Source: PYQ_2017

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