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Why we specifically note resistance in a circuit while all part of a wire have some resistance..?

Why we specifically note resistance in a circuit while all part of a wire have some resistance..???

Answer:

The resistance of the rest of the circuit compared to the resistance of the resistor is negligible.

Electronic Regulator

Manishankar asked:

how an electronic circuit works as a regulator?

Power factor in AC circuits

Dany Asked:

“what is meant by power factor?”

Ans:

In AC circuits, Power factor is defined as the ratio of true power to apparent power.

Power Factor =\frac{True Power}{Apparent Power}

If φ is the phase difference between E and I, then

True Power = EvIv cos φ and the Apparent Power is EvIv

Therefore,

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