A) an A.C. generator has commutator and a D.C. generator has slip rings.
B) an A.C. generator has slip rings and a D.C. generator has commutator.
C) A.C. generator rotates only in one direction.
D) the polarity of the current changes for every half rotation in a D.C. generator.
Correct Answer: B
Solution :
In an A.C. generator, the two ends of the coil are connected to two full rings of copper called slip rings. In a D.C. generator, the two ends of the coil are connected to a commutator consisting of two half rings of copper.
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