railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Single Phase Motor and Special Machines Single Phase Motor Types
The equivalent rotor resistance, 'r2 components in the equivalent circuit of a single-phase induction motor, based on two-revolving field theory, at any slip, s are
1
\(\frac{{{{\rm{r'}}_2}}}{{\rm{s}}}\) and \(\frac{{{{\rm{r'}}_2}}}{{1 - {\rm{s}}}}\)
2
\(\frac{{{{\rm{r'}}_2}}}{{\rm{s}}}\) and \(\frac{{{{\rm{r'}}_2}}}{{2 - {\rm{s}}}}\)
3
\(\frac{{{{\rm{r'}}_2}}}{{\rm{s}}}\) and \(\frac{{{{\rm{r'}}_2}}}{{2(1 - {\rm{s}})}}\)
4
\(\frac{{{{\rm{r'}}_2}}}{{\rm{2s}}}\) and \(\frac{{{{\rm{r'}}_2}}}{{2(2 - {\rm{s}})}}\)