B:-Only by the negative half cycle of the supply
C:-By positive & negative cycle of the supply
D:-None of the above
Correct Answer:- Option-C
Question59:-The procedure used for controlling the speed of a 3 phase induction motor is
A:-Fixed voltage -variable frequency method
B:-variable voltage -fixed frequency method
C:-variable voltage -variable frequency method
D:-Fixed voltage -fixed frequency method
Correct Answer:- Option-C
Question60:-The purpose of ....
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