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The speed of a dc motor can be controlled by the variation of
1. armature voltage.
2. field current. 3. armature circuit resistance.
4. angle of brush shift.
Which of the statements given above are correct?, Options are ⇒ (A) 1, 2, 3., (B) 2, 3, 4., (C) 1, 3, 4., (D) 1, 2, 4., (E) , Leave your comments or Download question paper.
Consider the following statements: The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? | |
A. | 1, 2, 3. [Correct Answer] |
B. | 2, 3, 4. [Wrong Answer] |
C. | 1, 3, 4. [Wrong Answer] |
D. | 1, 2, 4. [Wrong Answer] |