what is form factor? crest factor? peak factor? & power factor? in ac circuits

Form factor

Form factor is defined as the ratio of RMS value to the Average value. It is denoted as K_f

(a) In terms of a.c. current

form factor for sinusoidal waveform is 1.11. It has no unit.

(b) In terms of a.c. voltage

Crest factor or Amplitude factor

Amplitude factor is defined as the ratio of maximum value to RMS value. It is denoted as K_a

therefore, Crest factor or Amplitude factor,

(a) In terms of a.c. current

(b) In terms of a.c. voltage

Crest factor for sinusoidal waveform is 1.414, It has no unit.

Peak factor

It is defined as the ratio of maximum value to the RMS value of an alternating quantity.

Power factor

The power factor is defined as the cosine of the angle between voltage and current in an circuit.

Instantaneous value related to A.C. circuit

The value of an alternating quantity, i.e. voltage or current at any instant, is called its instantaneous value and is represented by ‘e’ or ‘i’ respectively.

here, are instantaneous value of current at time t1, t2 and t3.

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A.C. CIRCUITS TOPIC

1. Introduction Of AC Circuits In Electrical Engineering
2. How emf is induced in single phase system ? single phase generation .
3. Explain what is ac quantity : and Advantages of AC over DC in circuits
4. What is waveform, amplitude, cycle, time-period, phase & phase difference
5. Define RMS & average value as applied to A.C. voltage & current
6. What is form factor? crest factor? peak factor? & power factor? in ac circuits
7. what is phasor diagram, phasor algebra, leading & lagging ac quantities
8. Phasor representation of alternating quantities – resistive, inductive, capacitive
9. What is R-L-C series connection for A.C. circuit ? Explanation
10. What is series combination of R-L circuit ? Explanation
11. Define what is active power, reactive power, apparent power & power factor
12. Explain what is series combination of R-C circuit in electrical engineering
13. What is simple parallel AC circuits ? Explanation -electrical engineering
14. Resonance as applicable to simple RLC series circuit? effect on circuit performance
15. Explain three phase generation of voltage ? electrical engineering
16. Explain in detail about what is star and delta three phase system ?
17. Relation between phase voltage & line voltage in case of balanced star connected load
18. relationship between line current & phase current for delta connected 3 load
19. Relation between power consumed in a balanced star & delta connection

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