A dc shunt motor runs at rated speed. If its field circuit gets open circuited, then the motor speed would tend to
Increase
A dc shunt motor is driving a constant torque load with normal excitation. If the filed current is halved then the motor will run at
A dc shunt motor is driving a mechanical load at rated voltage with normal excitation. If the load torque is increased to double of the normal one, the speed of the motor will