The speed and torque of induction motors can be varied by which of the

1.	The speed and torque of induction motors can be varied by which of the following means:
A.	1 only
B.	2 only
C.	1 and 2 only
D.	1, 2 and 3
Answer» E.

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The speed and torque of induction motors can be varied by which of the following means:

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