$5\mathrm{.}11$ a rotating machine has the following electrical terminal relations: s$=($Lcos$2$$)$is $($Msin$)$iris$+($Lcos$2$$)$or$,$where is the of the rotor B$)$ calculate the co $"-$n$"$ energy I$\text{'}$m in terms of L M is ir and C$)$ Find the torque of electric origin on the rotor