Define following terms used in A.C. circuits : (i) Cycle (ii) Rms value (iii) Phase difference (iv) Average value

Define following terms used in A.C. circuits : (i) Cycle (ii) Rms value (iii) Phase difference (iv) Average value
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1 Answer

Answer :

(i) Cycle: 

 A complete set of variation of an alternating quantity which is repeated at regular interval of time is called as a cycle.

OR

 Each repetition of an alternating quantity recurring at equal intervals is known as a cycle.

(ii) RMS value : 

The RMS value of an AC is equal to the steady state or DC that is required to produce the same amount of heat as produced by AC provided that the resistance and time for which these currents flow are identical.

iii) Phase difference: 

 Phase difference is the difference in phase angle between two sinusoids or phasors.

(iv) Average value:

It is defined as the arithmetical average or mean of all the values of an alternating quantity over one cycle.

OR

For an alternating current , the average value is defined as that value of steady current (DC) which transfers the same charge as is transferred by the alternating current during the same time under the same conditions. 


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