Two components of no load current of single phase transformer are Iw = 0.4 A and Im = 1.44 A. Its no load power factor will be
1
\(\cos \left( {\frac{{0.4}}{{1.44}}} \right)\)
2
\(\cos \left[ {\frac{{0.4}}{{\sqrt {{{14.4}^2} - {{0.4}^2}} }}} \right]\)
3
\( \left[ {\frac{{0.4}}{{\sqrt {{{14.4}^2} + {{0.4}^2}} }}} \right]\)
4
None of the above