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Acoil of inductive reactance 31 Omegahas...

Acoil of inductive reactance `31 Omega`has a resistance of `8 Omega`. It is placed in series with a condenser of capadtative reactance `25 Omega`. The combination is connected to an a.c.source of 110 volt. The power factor of the circuit is

A

0.8

B

0.33

C

0.56

D

0.64

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CHETANA PUBLICATION-AC CIRCUITS-Exercise
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  2. In an A.C. circuit the current

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  3. Acoil of inductive reactance 31 Omegahas a resistance of 8 Omega. It i...

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  4. A light bulb is rated 100 W for a 220 V supply. The resistance of the ...

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  5. A 50 volt a.c. is applied across an RC (series) network. The rms volta...

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  6. Apure inductor of 25 mHis conneded to a source of 220 V. Given the fre...

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  7. If the rms current in a 50 Hz AC rircuit is 5A the value of the curren...

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  8. A resistor of 500 Omega and an indudance of 0.5 H are in series with a...

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  9. Thedisplacement currentisgivenby the expression

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  10. An alternating e.m.f. is given by e = 100 sin 314 t, the time within w...

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  11. A sinusoidal voltage e = 200 sin (100 t) is applied acrossaresistanceo...

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  12. Relation between erms and eois

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  13. A6Omega resistanceand 8Omega inductance are connected in series then p...

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  14. A current that does not perform any work is

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  15. In LCR series drcuit apparent power is

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  16. Seled true statement for purely inductive circuit

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  17. Resonance frequency for parallel LC circuit is given by

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  18. In LCR series drcuit, at resonance the applied e.m.f. and current

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  19. In series LCR circuit, at resonance impedance

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  20. In series LCR circuit R = 4Omega, L = 0.2 H and C = 0.1 F, at resonanc...

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