NEET UG 2021 · Physics · Question 37
NEET 2021 Physics, question 37
Question 37 of the NEET 2021 paper (code O1) is a Physics question from Alternating Current. Its idea, Half-Power Frequencies, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q37 · Physics
A series LCR circuit containing 5.0 H inductor, 80 F capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be :
- 146 rad/s and 54 rad/sOfficial answer
- 242 rad/s and 58 rad/s
- 325 rad/s and 75 rad/s
- 450 rad/s and 25 rad/s
Official answer: option 1 · NTA final answer key
Same idea
The only question on Half-Power Frequencies
No other NEET paper from 2017–2026 tested this exact idea.
Half-Power Frequencies: every question and how it was framed
The chapter
Alternating Current in ten years of NEET
15 questions from 2017–2026, asked in 8 of 10 papers, about 1.4 a paper. LCR Circuits alone had 15.