In a dc compound motor, 4-point starter provides
All of the above
In a dc compound motor, 4-point starter provides Over load protection, Under voltage protection and The facility for wide range of speed control by field regulator.
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