NEET UG 2020 · Physics · Question 169
NEET 2020 Physics, question 169
Question 169 of the NEET 2020 paper (code E1) is a Physics question from Alternating Current. Its idea, Unity Power Factor at Resonance, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q169 · Physics
A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is . If instead C is removed from the circuit, the phase difference is again between current and voltage. The power factor of the circuit is :
- 1zero
- 20.5
- 31.0Official answer
- 4
Official answer: option 3 · NTA final answer key
Same idea
The only question on Unity Power Factor at Resonance
No other NEET paper from 2017–2026 tested this exact idea.
Unity Power Factor at Resonance: 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.