For controlling the speed of 3ϕ induction motor, which of the followi – McqOptions

MCQOPTIONS

1.	For controlling the speed of 3ϕ induction motor, which of the following scheme is used:
A.	Fixed voltage and fixed frequency scheme
B.	Fixed voltage and variable frequency scheme
C.	Variable voltage and variable frequency scheme
D.	Variable voltage and fixed frequency scheme
Answer» D. Variable voltage and fixed frequency scheme

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