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1. Voltage control.
2. Rotor resistance control.
3. Frequency control.
4. Pole changing method.
Select the correct answer using the codes given below:, Options are ⇒ (A) 2, 3 and 4., (B) 1, 3 and 4., (C) 1, 2 and 3., (D) 2 and 4., (E) , Leave your comments or Download question paper.
Which of the following methods are suitable for the speed control
of squirrel cage induction motors? 1. Voltage control. 2. Rotor resistance control. 3. Frequency control. 4. Pole changing method. Select the correct answer using the codes given below: | |
A. | 2, 3 and 4. [Wrong Answer] |
B. | 1, 3 and 4. [Correct Answer] |
C. | 1, 2 and 3. [Wrong Answer] |
D. | 2 and 4. [Wrong Answer] |