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In an AC circuit with voltage V and curr...

In an `AC` circuit with voltage `V` and current `I`, the power dissipated is

A

Depends on the phase between `V and I`

B

`(1)/(sqrt2)Vi`

C

`(1)/(2) Vi `

D

`vi`

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A
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In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The average power transferred per cycle t inductors is

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The electrial energy spent in running the circuit for one hour is

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