JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 24 February 2021, Shift 2, Physics Q28

Question 28 of 90 in this shift, Physics question 28 of 30, Section B.

A series LCR circuit is designed to resonate at an angular frequency

\omega_0 = 10^5\ \mathrm{rad/s}

. The circuit draws 16 W power from 120 V source at resonance. The value of resistance 'R' in the circuit is __________

\Omega

Official answer

900

NTA final key.

Chapter: Alternating Current
Topic: LCR Resonance
Idea tested: Power Factor at Resonance

Same idea in other shifts

Asked 4× in all

10 Apr 2023, Shift 1 · Q45Given below are two statements : Statement I : Maximum power is dissipated in a circuit containing an inductor, a capacitor and a resistor…EasyTwo statements
12 Apr 2023, Shift 1 · Q35Given below are two statements: Statement I : When the frequency of an a.c source in a series LCR circuit increases, the current in the…EasyTwo statements
30 Jun 2022, Shift 1 · Q57A series LCR circuit with R = $\frac{250}{11}$ $\Omega$ and $\mathrm{X_L}$ = $\frac{70}{11}$ $\Omega$ is connected across a 220 V, 50 Hz…MediumNumerical value

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.