11.The starting resistance of a D.C. motor is generally

12.Which D.C. motor will be suitable alongwith flywheel for intermittent light and heavy loads?

13.In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to

14.If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens

15.In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be