STANDARDPhysics-Alternating Current
STANDARD Physics Power Factor MCQ Question
Type: MCQ-numerical-Medium-Class 12
The power factor of the circuit as shown in figure is
A
0.2
B
0.4
C
0.8
D
0.6
Correct Answer
Option C
Detailed Explanation
Resistance of the circuit, R = R₁ + R₂ = 40 Ω + 40 Ω = 80 Ω. Impedance of the circuit, Z = √(R² + (Xc - Xl)²) = √(80² + (40 - 100)²) = 100 Ω. Power factor = R/Z = 80/100 = 0.8.
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