| Q.17 | Which of the following statements about the speed control of DC motors is correct? | |
| Ans | 1. The field flux control is otherwise called constant power drive method. | |
| 2. The armature resistance method of speed control is employed to obtain speed above the base speed. | ||
| 3. The flux control method is otherwise called constant torque drive method. | ||
| 4. In the speed control by varying field flux, the speed can be regulated at the base speed. |
Correct Ans: 1
