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Commutation in a dc machine may be explained as a process | |
A. | in which magnetic field is set up. [Wrong Answer] |
B. | by virtue of which emf is induced in the armature conductors, [Wrong Answer] |
C. | by which current in a coil is reversed during the period it is short circuited by the brush. [Correct Answer] |
D. | how armature flux affects the main field flux. [Wrong Answer] |