b) A Series-Connected DC motor has an armature resistance of \( 0.6 \Omega \) and field windins resistance of \( 1.9 \Omega, I^{2} R \) is 190 W . Given that the motor runs at 900 rpm , the current drawn by the notor is 12.5 A from a voltage source of \( \mathrm{V}_{\mathrm{T}}=240 \mathrm{~V} \). Both mechanical and Iron losse. (rotational) are 20SW. Calculate;
(i) The output power
(ii) The motor efficiency
[5 Marks]