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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACSeries AC CircuitsEasy2 minPYQ_2020

PhysicsEasynumerical

An A.C. voltage $V = 5 \cos (1000 t) V$ is applied to an $L - R$ series circuit of inductance $3 mH$ and resistance $4 Ω$ . The value of the maximum current in the circuit is ______ $A$ .

Answer:

1.00

Solution:

$V = 5 \cos 1000 t V$

$V = V_{0} \cos ω t$

$V_{0} = 5 V$

$ω = 1000 rad s^{- 1}$

$L = 3 \times 10^{- 3} H, R = 4 Ω$

Maximum current $I_{0} = \frac{V_{0}}{Z}$

$I_{0} = \frac{5}{\sqrt{ω^{2} L^{2} + R^{2}}} = \frac{5}{5} = 1 A$

Subject:PhysicsTopic:EMI/ACSubtopic:Series AC Circuits

⏱ 2mℹ️ Source: PYQ_2020

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