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A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series with a condenser of capacitative reactance 25Ω. The combination is connected to an a.c. source of 110 volt. The power factor of the circuit is
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- 0.64
- 0.80
- 0.33
- 0.56
Correct Option: B
Power factor,
| φ = | ||
| √[ωL -(1/ωC)²] + R² |
| = | 8 | = | 8 |
| √(31 - 25)² + 8² | √6² + 8² |
| = | 8 | = 0.8 |
| 10 |
