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  • The line that draws power supply to your house from street has A. zero average current. B. 220 V average voltage

The line that draws power supply to your house from street has
A. zero average current.
B. 220 V average voltage.
C. voltage and current out of phase by 90°.
D. voltage and current possibly differing in phase \phi such that \left | \phi \right |< \frac{\pi}{2}

Answers (1)

The correct answer are the options (a,d)

It is a known fact that AC supply is used in houses.

The average current over a cycle of AC is zero. L and C are connected  in household circuit so R and Z cannot be equal.

So \: Power\: factor\: = \cos \phi=\frac{R}{Z}\neq 0=\phi\neq \frac{\pi}{2}

\phi< \frac{\pi}{2} \:i.\:e.phase \:angle\: between\: voltage\: and\: current\: lies\: between\: 0\: and\: \frac{\pi}{2} 

Posted by

infoexpert21

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