engineering recuitment UPMRC JE 2024 Mock Test Electrical Machines Transformer Regulation of a Transformer
A transformer has equivalent resistance referred to secondary R02 and reactance referred to secondary X02 . The regulation will be zero when the phase angle is ________.
1
\(\phi = {\tan ^{ - 1}}\left( {\frac{{{X_{02}}}}{{{R_{02}}}}} \right)\)
2
\(\phi = {\tan ^{ - 1}}\left( {\frac{{{R_{02}}}}{{{X_{02}}}}} \right)\)
3
\(\phi = {\tan ^{ - 1}}\left( {\sqrt {\frac{{{R_{02}}}}{{{X_{02}}}}} } \right)\)
4
\(\phi = {\tan ^{ - 1}}\left( {\sqrt {\frac{{{X_{02}}}}{{{R_{02}}}}} } \right)\)