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What is the purpose of a capacitor in an AC circuit?
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1 Answer

Every AC supply is not ideal AC it contains DC component so to provide restriction to DC component in supply we have to use Capacitor
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Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.

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In an AC. circuit, a low value of kVAR compared with kW indicates high power factor.

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An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

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It  can  be  applied  to  AC  circuits

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Can we apply Norton's theorem in an AC circuit?

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 An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

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 An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

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For a DC circuit capacitor is

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For a DC circuit capacitor is virtually an open circuit

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A parallel AC. circuit in resonance will?

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A parallel AC. circuit in resonance will have a high impedance.

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Explain power in single phase AC circuit.

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Explain working of static AC circuit breaker. 

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Static AC Circuit breaker: The circuit configuration of static AC circuit breaker using SCR is shown in the figure. When switch S' is closed, the SCRs T1 and T2 are fired in positive ... non-availability of gate current. Thus the maximum time delay for breaking the circuit is one half-cycle.

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Explain working of AC circuit breaker using SCR with circuit diagram.

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Can we apply the superposition theorem to AC circuit?

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In an A.C. circuit power is dissipated in?

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The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is 6 kVAR.

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The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?

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The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW.

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How does a capacitor improve power factor?

Answer :

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Thyristor Switched Capacitor (TSC)

Answer :

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Answer :

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Pure inductive circuit takes power from the A.C. line when?

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