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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSeries AC CircuitsEasy2 minPYQ_2020

PhysicsEasysingle choice

An AC e.m.f $E = 4 \cos 1000 t V$ is applied to an $L R$ circuit containing inductance $3 m H$ and resistance $4 Ω$ . The amplitude of the current is

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Answer:

Solution:

$i_{0} = \frac{V_{0}}{Z},$

$Z = \sqrt{R^{2} + {(ω L)}^{2}}$

$= \sqrt{4^{2} + {(1000 \times 3 \times 1 0^{- 3})}^{2}} = 5 Ω$

$i_{0} = \frac{4}{5}$

$i_{0} = 0.8 A$

Subject:PhysicsTopic:EMI/ACSubtopic:Series AC Circuits

⏱ 2mℹ️ Source: PYQ_2020

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