1.

Which, among the following, is the correct expression for φ.(a) φ=tan^-1 (XL/R)(b) φ=tan^-1 (R/XL)(c) φ=tan^-1 (XL*R)(d) φ=cos^-1 (XL/R)

Answer» The correct option is (a) φ=tan^-1 (XL/R)

The best I can explain: From the impedance triangle, we get tanφ= XL/R.

Hence φ=tan^-1 (XL/R).


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