Question: A 3-phase induction motor runs at almost 50 rpm at no load and 25 rpm at full load when supplied with power from a 50 Hz, 3-phase supply. What is the corresponding speed of the rotor field with respect to the rotor?
Options
A : 25 revolution per minute
B : 20 revolution per minute
C : 10 revolution per minute
D : 30 revolution per minute
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