1.

The r.m.s current in an `AC` circuit is `2A`. If the wattless current be `sqrt(3)A`, what is the power factor?A. `1/2`B. `1/3`C. `1/sqrt(3)`D. `1/sqrt(2)`

Answer» Correct Answer - A
We know that, `I_(WL) = I_(rms)sinphi`
`rArr sqrt(3) = 2sinphi` or `sinphi= sqrt(3)/2 rArr phi=60^(@)`
So, power factor = `cosphi=cos60^(@)=1/2`


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