# AC power

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AC power

## Related questions

1 answer 29 views

AC power plugs and sockets

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Is the power line voltage available in our homes a dc or an ac voltage?

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What is the symbol for AC power?

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Explain power in single phase AC circuit.

1 answer 8 views

1 answer 25 views

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?

1 answer 85 views

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

2 answers 38 views

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

1 answer 32 views

A large AC generator, supplying power to an infinite bus, has a sudden short-circuit occurring at its terminals. Assuming the prime mover input and the voltage behind the transient reactance to remain constant immediately after the fault, acceleration of the generator rotor is

1 answer 226 views

Total instantaneous power supplied by a 3-phase ac supply to a balanced R-L load is

1 answer 18 views

AC Circuits with Resistance but No Reactance

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What is the need of polarity marking in polyphase AC circuits?

1 answer 18 views

Explain how sinusoidal AC voltage is generated by using simple one loop generator.

1 answer 8 views

‘PMMC instrument is not suitable to measure AC quantity’. State the reason.

2 answers 74 views

UNIT 1 fundamentals of AC rotating machine Contents 1.1 Introduction 1.2 Advantages 1.3 Parts of AC machines 1.4 Synchronous speed 1.5 AC winding 1.6 Winding factor (Coil pitch and distributed winding) 1.7 Distribution factor 1.8 EMF equation of alternator or generator 1.9 Numericals 1.10 Harmonic 1.11 Slot harmonics 1.12 Harmonics minimization

1 answer 58 views

Draw the waveform of three phase AC supply voltage.

2 answers 360 views

Do you think is DC better than AC to transmit energy?

0 answers 66 views

Write short notes on 3 phase AC system.

2 answers 317 views

Distinguish between AC and DC.

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The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz

1 answer 37 views

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

1 answer 21 views

The main advantage of AC over DC is:  (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above

1 answer 205 views

An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to  (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity

1 answer 19 views

The ac bypassing of RF by CF in a common emitter configuration :  (A) increases ac signal across emitter -base junction (B) decreases ac signal across emitter -base junction (C) decreases voltage amplification (D) stabilizes the Q -point

1 answer 56 views

For measurement of radio frequency ac signals __________ type meter is used

1 answer 58 views

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  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

1 answer 27 views

Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above

1 answer 21 views

The direction of rotation of an inverter fed 3-phase ac motor is reversed by (A) a mechanical reversing switch (B) reversing the input dc link voltage (C) operating the inverter as a rectifier (D) changing the sequence of switching

1 answer 20 views

In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current

1 answer 29 views

A parallel AC. circuit in resonance will?

1 answer 20 views

In AC. circuits, laminated iron is invariably used in order to?

1 answer 49 views

In an AC. circuit, a low value of kVAR compared with kW indicates?

1 answer 26 views
0 answers 33 views

How is a thyristor used to convert AC to DC?

1 answer 109 views

What is the difference between an AC and DC generator?

0 answers 9 views

What are the parts of AC motor?

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What is the principle of AC motor?

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Do AC induction motors have back EMF?

2 answers 53 views

Do cell phones use AC or DC current?

1 answer 23 views

Why does a transformer only work with an AC supply?

2 answers 40 views

Is current from a battery AC or DC?

1 answer 19 views

How does AC current change direction?

2 answers 36 views

What is the direction of an AC current?

3 answers 67 views

Why do we use AC current in our homes?

0 answers 25 views

Explain series switching control of AC load. Single phase resistance load - Integral half cycle control Phase control - Resistance load

0 answers 44 views

Explain the pulse width modulation technique for control of AC output voltage.

1 answer 53 views

Is electricity generated in AC or DC?

1 answer 85 views

What is the difference between AC and DC drive?

0 answers 28 views

What is the use of AC and DC drives?