JEE Main 2022 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 28 June 2022, Shift 1, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

A telegraph line of length 100 km has a capacity of 0.01

\mu

F/km and it carries an alternating current at 0.5 kilo cycle per second. If minimum impedance is required, then the value of the inductance that needs to be introduced in series is ____________ mH. (if

\pi = \sqrt{10}

)

Official answer

100

NTA final key.

Chapter: Alternating Current
Topic: LCR Resonance
Idea tested: Resonant Frequency Calculation

Same idea in other shifts

Asked 9× in all

5 Apr 2026, Shift 2 · Q48A series LCR circuit with $R=20\ \Omega$ , $L=1.6$ H and $C=40\ \mu\mathrm{F}$ is connected to a variable frequency a.c. source. The…EasyNumerical value
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25 Feb 2021, Shift 1 · Q27A transmitting station releases waves of wavelength 960 m. A capacitor of $2.56\ \mu$ F is used in the resonant circuit. The self…EasyNumerical value
26 Feb 2021, Shift 2 · Q18Find the peak current and resonant frequency of the following circuit (as shown in figure).MediumDiagram basedHas a figure
25 Jul 2021, Shift 2 · Q25Two circuits are shown in the figure (a) & (b). At a frequency of __________ rad/s the average power dissipated in one cycle will be same…MediumNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.