Study of DC Motor 
1. Most preferred dc motor for constant speed application is
2. In the case of dc machines, the mechanical losses are primarily the functions of
3. Motors are rated in
4. The symbol in the given figure shows a
5. The back-emf effect is equivalent to an ______ which tends to improve the stability of the motor and in general the stability of the system
6. For speed control of dc motor, which technique provides speed above base speed?
7. Starters are used with dc motors because
8. Which part of the motor confirms that it is a dc motor?
9. If a dc motor is connected across the ac supply, it will
10. The speed of a permanent magnet dc motor cannot be controlled by
11. If a resistance is added in series with the field winding of dc shunt motor, then its