In a commutator
A) copper is harder than mica
B) mica and copper are equally hard
C) mica is harder than copper
D) none of the above
Correct Answer:
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Q3: Which of the following could be lamina-proximately
Q4: The armature of D.C. generator is laminated
Q5: The resistance of armature winding depends on
A)length
Q6: The field coils of D.C. generator are
Q7: The commutator segments are connected to the
Q9: In D.C. generators the pole shoes are
Q10: Satisfactory commutation of D.C. machines requires
A)brushes should
Q11: Fleming's right-hand rule regarding direction of induced
Q12: While applying Fleming's right-hand rule to And
Q13: The bearings used to support the rotor
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