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In an ac circuit, the current is given b...

In an ac circuit, the current is given by I = `5sin ( 100t-pi/2)`and the ac potential is V=200sin(100)volt.Thenthepower consumption is

A

20 watts

B

40 watts

C

1000 watts

D

0 watts

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CHETANA PUBLICATION-AC CIRCUITS-Exercise
  1. The peak value of 220 volts of ac mainsis

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  2. If a current I given by Io sin (omega-pi/2) flowsin an ac circuit acro...

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  3. In an ac circuit, the current is given by I = 5sin ( 100t-pi/2)and the...

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  4. The frequency of an alternating voltage is 50 cycles//sec and its ampl...

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  5. The ratio of peak value and r.m.s. value of an alternating current is

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  6. The power factor of LCR circuit at resonance is

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  7. Power delivered by the source of the circuit becomes maximum, when

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  8. In a circuit containing an inductance of zero resistance, the e.m.f. o...

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  9. An alternating e.m.f. is applied to purely capacitive circuit. The pha...

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  10. An alternating current of frequency 'f isflowing in a circuit containi...

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  11. The average power dissipation in a pure capacitance in ac circuit is

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  12. An alternating voltage e = 200 sqrt2 sin (100 t) is connected to a 1mi...

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  13. L, C and R denote inductance, capacitance and resistance respectively....

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  14. What will be the phase difference between virtual voltage and virtual ...

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  15. Power factor is maximum in an LCR circuit when

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  16. The capacity of a pure capacitor is1Farad. In DC circuits, its effecti...

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  17. A 220 V, 50 Hz as source is connected to an inductance of 0.2 H and a ...

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  18. For high frequency, a capacitor offers

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  19. In LCR circuit the pd between the terminals of the inductance is 60 V,...

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  20. In a LCR circuit capacitance is changed from C to 2C. For the resonant...

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