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For a domestic AC supply of 220 V at 50 ...

For a domestic AC supply of 220 V at 50 cycles per second, the potential difference between the terminals of a two pin electric outlet in a room is given by

A

` V (t) = 220 sqrt(2) cos (100 pi t)`

B

`V (t) = 220 cos (50 pi t)`

C

`V (t) = 220 cos (100 pi t)`

D

`V (t) = 220 sqrt(2) cos (50 pi t )`

Text Solution

Verified by Experts

The correct Answer is:
A
R.M.S. value = 220V
Peak value `= 220 sqrt(2) rArr omega = 2 pi n = 2 pi xx 50 = 100 pi `
`rArr V (t) = 220 sqrt(2) cos (100 pi t) `
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