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In an AC circuit, the power factor...

In an `AC` circuit, the power factor

A

unity when the circuit contains only an inductance

B

unity when the circuit contains only a resistance

C

zero when the circuit contains only a resistance

D

unity when the circuit contains only a capacitance

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The correct Answer is:
B
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CP SINGH-ALTERNATING CURRENT-EXERCISES
  1. In the given LR circuit the source has angular frequency omega The pow...

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  2. An ac source is connected across a resistance of 10 Omega The power di...

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  3. In an AC circuit, the power factor

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  4. The average power dissipated in a pure inductor L carrying an alternat...

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  5. An AC source rated 100 V (rms) supplies a current of 10 A(rms) to a ci...

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  6. In an LCR circuit the energy is dissipated in

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  7. Power delivered by an ac source of angular frequency Omega(0) to an LC...

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  8. Two coils A and B are connected in series across a 240V ,50 Hz supply ...

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  9. In previous question the resistance of coil B is

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  10. In previous question the resistance of coil A is .

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  11. A choke coil has.

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  12. A choke coil is preferred to a resistance for reducing current in an a...

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  13. An electric lamp which runs at 80 volt d.c. and consumes 10 ampere is ...

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  14. In the circuit shown, R is a pure resistor, L is an inductor of neglig...

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  15. A capacitor and an inductor are connected in parallel across an ac sou...

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  16. In the given circuit the current drawn from the source is .

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  17. An inductor of 10mH an a capacitor of 16mF are connected in the circui...

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  18. The AC voltage across a resistance can be measured using

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  19. Alternating current can be measured by

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  20. Hot wire ammeters can be used for measuring

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