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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSelf and mutual inductorEasy2 minPYQ_2015

PhysicsEasysingle choice

When the current in a coil changes from $5 A$ to $2 A$ in $0 .1 s$ , an average voltage of $50 V$ is produced. The self-inductance of the coil is

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Answer:

Solution:

Magnetic flux

$ϕ = L I \Rightarrow \frac{∆ ϕ}{∆ t} = L \frac{∆ I}{∆ t}$

$∴ {(ε_{ind})}_{average} = |\frac{∆ ϕ}{∆ t}| = L |\frac{∆ I}{∆ t}|$

$\Rightarrow 50 = L \times \frac{5 - 2}{0.1}$

$\Rightarrow \frac{5}{3} = L$

$\Rightarrow L = 1.67 H$

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Self and mutual inductor

⏱ 2mℹ️ Source: PYQ_2015

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