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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACInduced Electric FieldEasy2 minPYQ_2020

PhysicsEasysingle choice

Two concentric and coplanar circular coils have radii $a$ and $b (≫ a)$ as shown in the figure. The resistance of the inner coil is $R$ and the current in the outer coil is increased from $0$ to $i$ , then the total charge circulating in the inner coil is

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Answer:

Solution:

Initial flux linked with inner coil when $i = 0$ is zero.

Final flux linked with inner coil when $i = i$ is

$ϕ = (\frac{μ_{0} i}{2 b}) {πa}^{2}$

$|∆ q| = |\frac{∆ ϕ}{R}|$

$\Rightarrow ∆ q = (\frac{μ_{0} i}{2 b}) \frac{{πa}^{2}}{R}$

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

⏱ 2mℹ️ Source: PYQ_2020

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