JEE Main 2021 — Alternating Current Question with Solution
From: JEE Main 2021 (Online) 25th February Morning Shift
Question
The angular frequency of alternating current in a L-C-R circuit is 100 rad/s. The components connected are shown in the figure. Find the value of inductance of the coil and capacity of condenser.
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
B0.8 H and 250 F
Step-by-step explanation
Since key is open, circuit is series
15 = irms (60)
irms = A
Now, 20 = XL = (L)
L = = 0.8 H
and 10 =
C = F = 250F
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This is a previous-year question from JEE Main 2021, covering the Alternating Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.