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What is wattless current ?...

What is wattless current ?

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When in an AC circuit phase difference between voltage and current becomes `pi`/2, then average power becomes zero and the current is called wattless current. For pure capacitor and inductor , phase difference is `pi`/2, hence these components do not consume any power.
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What is meant by wattles current ?

Assertion : In a purely inductive or capacitive circuit, the current is referred to as wattless currents. Reason : No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

In the series LCR circuit as shown in figure, the heat developed in 80 seconds and amplitude of wattless current is :

A circuit consisting of an inductance and a resistance joined to a 200 volt supply ( A.C.) It draws a current of 10 ampere. If the power used in the circuit is 1500 watt, then the wattless current component is

The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. e = 311 sin (100 pit) . If the value of wattless current is 0.5A and the impedance of the circuit is 311Omega , the power factor will be –

In an AC circuit,the instantaneous e.m.f.,and current are given by E=100sin30tI=20sin(30t-(pi)/(4)) In one cycle of AC,the average power consumed by the circuit and the wattless current are respectively

In an a.c. circuit, the instantaneous e.m.f. and current are given by e = 100 sin 30 t i = 20 sin( 30t-(pi)/(4)) In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively :

In an a.c. circuit, the instantaneous e.m.f. and current are given by e=100sin30t I=20sin(30t-(pi)/(4)) In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively.

The r.m.s current in an AC circuit is 2A . If the wattless current be sqrt(3)A , what is the power factor?

MODERN PUBLICATION-ALTERNATING CURRENT -CONCEPTUAL QUESTIONS
  1. An alternating power of frequency 20 cycles per second is used to supp...

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  2. What would be the equivalent reactance of a capacitor and inductor whe...

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  3. What is wattless current ?

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  4. Suppose we have a transformer which converts 220 V AC to 12 AC. In the...

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  5. The reactance of a circuit is zero It is possible that the circuit con...

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  6. In an AC circuit , it if found that the current is zero when voltage i...

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  7. A bulb a capacitor is connected in series across an alternating power...

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  8. Two identical electric bulbs X and Y are connected in two different ci...

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  9. At an airport, a perosn is made to walk through the door wy of a meta...

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  10. Choke coil is used to control

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  11. What is the use of choke coil in AC circuit? Can we use a rheostat in ...

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  12. what is resonance in series LCR circuit ?

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  13. Can we use galvanometer to measure alternating current ?

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  14. Can a hot-wire ammeter be used to measure a direct current having a co...

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  15. Why do we use a transformer in AC circuits?

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  16. Two circuit elements X and Y are connected across an alternating curre...

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  17. A step up transformer is used to

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  18. For circuits used for transporting electric power, a low power factor ...

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  19. A lamp is connected in series with a capacitor. Predict your observati...

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  20. बिजली के एक बल्ब से श्रेणीक्रम में जुड़ी चोक कुंडली को दिष्टधारा (d....

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