The variable resistance representing the mechanical load in the equivalent circuit of a 3 – phase IM is given by
1
\({r_2}\left( {s - 1} \right)\)
2
\({r_2}\left( {\frac{1}{s} - 1} \right)\)
3
\({r_2}\left( {1 - \frac{1}{s}} \right)\)
4
\({r_2}\left( {1 - s} \right)\)