Question

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 are in phase.

Answer 1

The line that draws power supply to your house from street has

220 V average voltage.

Answer 2

Answer:

(a) & (d).

Explanation:

tan(fie)=XL-Xc/R

and if (fie)=90

tan(fie)=infinity implies R=0 which is not possible

Therefore fie<90

And 220V is the rms voltage, average voltage is zero.

So, option (a)and (d) are correct.....