What reading would you expact of a square-wave current, suitching rapodly between +0.5 A and -0.5 A, when passed through an ac ammeter?

Options

A. `0.5A`
B. `0.25sqrt2A`
C. `0.25A`
D. `0.5sqrt2A`

Answer

A

Explanation

`bari^(2) =underset(0)overset(T)int/(underset(0)overset(T)intdt) = ("area of"i^(2) v//s t "for" t = 0 t0 t = T)/(T) `
`= (0.025T)/(T) =0.05A`
`i_(rms) = sqrt(bari^(2)) =0.5A`
ac ammeter gives rms value