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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSeries AC CircuitsEasy2 minPYQ_2020

PhysicsEasysingle choice

A solenoid has an inductance of $50 m H$ and a resistance of $0.025 Ω$ . If it is connected to a battery, how long will it take for the current to reach one half of its final equilibrium value?

Options:

Answer:

Solution:

Time constant is,

$τ = \frac{L}{R}$

Time for current to reach the half of final value is,

$t_{\frac{1}{2}} = τ l n (2)$

$t_{\frac{1}{2}} = \frac{L}{R} \ln (2)$

$t_{\frac{1}{2}} = \frac{50 \times 1 0^{- 3}}{0.025} (0.693)$

$t_{\frac{1}{2}} = 1.38 s$

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

⏱ 2mℹ️ Source: PYQ_2020

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