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The power factor of LCR circuit at reson...

The power factor of LCR circuit at resonance is-

A

0.707

B

1

C

0.5

D

zero

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The correct Answer is:
B
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RESONANCE-ALTERNATING CURRENT-Exercise
  1. In an AC circuit, V and I are given by V=100sin(100t)volts, I=100sin(1...

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  2. In the circuit below, the AC source the voltage V=20cos (omegat) volts...

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  3. A coil of 200Omega resistance and 1.0H inductance is conneted to an AC...

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  4. In series LCR circuit, the voltages across R, L and C are shown in the...

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  5. When 100 V DC is applied across a solenoid, a current of 1.0 A flows i...

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

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  7. The power factor of LCR circuit at resonance is-

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  8. In an ac circuit the current is given by i=0.5 sin (314 t + 60^@) mill...

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  9. In an electric circuit applied ac emf is e=20 sin 300t volt and the cu...

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  10. The time required for a 50Hz alternating current to increase from zero...

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  11. A steady dc current of 2.83A is flowing in a resistance wire. The rms ...

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  12. The variation of the instantaneous current (I) and the instantaneous e...

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  13. In a series LCR circuit containing an AC voltage source of frequency o...

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  14. An alternating emf is applied across a parallel combination of a resis...

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  15. The value of current at half power points is -

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  16. The power factor of a good choke coil is

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  17. Which of the following has dimensions different from the other three,-

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  18. In the figure shown, a current of 2 amperes flows in the circuit. The ...

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  19. Assertion (A) : The electrostatic energy stored in capacitor plus magn...

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