Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACFaraday law/Lenz lawEasy2 minPYQ_2020

PhysicsEasysingle choice

The magnetic flux through a circuit of resistance $R$ changes by an amount $Δ ϕ$ in a time $Δ t$ . Then the total quantity of electric charge $Q$ , that passes through any point in the circuit during this $Δ t$ time is, represented by

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Answer:

Solution:

Induced emf is given by $ε = \frac{Δ ϕ}{Δ t}$

Current, $I = \frac{Q}{Δ t} = \frac{Δ ϕ}{Δ t} \times \frac{1}{R}$ [where $Q$ is total charge passed in time $Δ t$ ]

$\Rightarrow Q = \frac{Δ ϕ}{R}$

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

⏱ 2mℹ️ Source: PYQ_2020

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