NEET UG 2021 · Physics · Question 34
NEET 2021 Physics, question 34
Question 34 of the NEET 2021 paper (code O1) is a Physics question from Alternating Current. Its idea, Impedance Triangle Applications, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q34 · Physics
An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance 'R' are connected in series to an ac source of potential difference 'V' volts as shown in figure.
Potential difference across L, C and R is 40 V, 10 V and 40 V, respectively. The amplitude of current flowing through LCR series circuit is A. The impedance of the circuit is :
The figure, described in words
Stem: series LCR circuit diagram with inductor, capacitor, resistor and ac source V, with potential differences 40 V, 10 V and 40 V marked across L, C and R.
- 14 Ω
- 25 ΩOfficial answer
- 3 Ω
- 4 Ω
Official answer: option 2 · NTA final answer key
Same idea
The only question on Impedance Triangle Applications
No other NEET paper from 2017–2026 tested this exact idea.
Impedance Triangle Applications: 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.