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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSelf and mutual inductorEasy2 minPYQ_2020

PhysicsEasysingle choice

A current of $10 A$ in the primary coil of a circuit is reduced to zero. If the coefficient of mutual inductance is $3 H$ and emf induced in the secondary coil is $30 kV,$ time taken for the change of current is

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Answer:

Solution:

As $e = M \frac{d i}{d t}$

$∴ 30 \times 10^{3} = 3 \times \frac{10}{d t},$

$d t = \frac{30}{30 \times 10^{3}} = 10^{- 3} s$

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

⏱ 2mℹ️ Source: PYQ_2020

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