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The line that draws power supply to your...

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 `|phi| lt pi/2`

Text Solution

Verified by Experts

The correct Answer is:
A, D
For household supplies, AC currents are used which are having zero average value over a cycle.
The line (cable) is having some resistance so power factor,
cos `phi=R/Z ne 0`
Hence, `phi ne pi/2`
`therefore phi lt pi/2`
Means, phase difference lies between 0 and `pi/2`
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