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A coil of inductive reactance 31Omega2 h...

A coil of inductive reactance `31Omega2` has a resistance of `8Omega`. It is placed in series with a condenser of capacitive reactance `25Omega`. The combination is connected to an ac source of 110 V. The power factor of the circuit is

A

0.56

B

0.64

C

0.8

D

0.33

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-ALTERNATING CURRENT-EXERCISE - II
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  3. An alternating emf of e=200sin100pit is applied across a capacitor of ...

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  4. In a series circuit R= 300 Omega, L= 0.9 H, C = 2.0 muF " and " omega=...

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  5. In a series LCR circuit R = 10 Omega and the impedance Z = 20 Omega. T...

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  6. In an LCR series circuit, the voltages across R, L and C at resonance ...

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  7. A resistance of 10 Omega a capacitance of 0.1muF and an inductance of ...

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  8. The potential differences across the resistance, capacitance and induc...

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  9. An inductance of 1 mH and a charged capacitor capacitance of 10muF are...

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  10. An inductor of inductance 100mH is connected in series with a resistan...

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  11. The following series L-C-R circuit, when driven by an e.m.f. source of...

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  12. A series LCR circuit is connected to a source of alternating emf 50 V ...

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  13. In a circuit L,C and R are connected in series with an alternating vol...

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  14. The magnetic field energy in an inductor changes from maximum value to...

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  15. A coil of inductive reactance 31Omega2 has a resistance of 8Omega. It ...

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  17. In a transformer, number of turns in the primary are 140 and that in t...

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  18. The number of turns in primary and secondary windings of a transformer...

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  19. The number of turns in primary and secondary coils of a transformer is...

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