JEE Main 2026 Physics question
A LCR series circuit driven with =90 V at frequency =30 Hz has resistance R=80 Ω, an inductance with inductive reactance =20.0 Ω and capacitance with capacitive reactance =80.0 Ω. The power factor of the circuit is .
Answer: (A)
Solution
Z=√(80²+(80−20)²)=100 Ω, so power factor cosφ=R/Z=0.8.