Power factor = cosφ = 1 means φ = 0°. This occurs at resonance when XL = XC.
Back to JEE Main 2021 Electromagnetism
JEE Main 2021 — Physics Electromagnetism
easy
mcq
2021
Official previous-year question
Verified 30 May 2026.
Question
In an LCR series circuit, the power factor is unity. What is the phase difference between current and voltage?
Options
- A0°
- B45°
- C90°
- D180°
Solution
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