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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSeries AC CircuitsEasy2 minPYQ_2020

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An emf of $15 V$ is applied in a circuit coil containing $5 H$ inductance and $10 Ω$ resistance. The ratio of currents at time $t = \infty$ and $t = 1 s$ is

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Answer:

Solution:

Here, $i = i_{0}$ , at $t = \infty$

Let $i$ be the current at $t = 1 s$

From $i = i_{0} (1 - e^{- \frac{R}{L} t})$

= $i_{0} (1 - e^{- \frac{10}{5} \times 1}) = i_{0} (1 - \frac{1}{e^{2}})$

$∴ \frac{i_{0}}{i} = \frac{e^{2}}{e^{2} - 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Series AC Circuits

⏱ 2mℹ️ Source: PYQ_2020

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