Open circuited armature coil of a D.C. machine is
A) identified by the scarring of the commutator segment to which open circuited coil is connected
B) indicated by a spark completely around the commutator
C) both (a) and (b)
D) none of the above
Correct Answer:
Verified
Q1: The armature core of a D.C. generator
Q3: For the parallel operation of two or
Q4: D.C. series generator is used
A)to supply traction
Q5: Following D.C. generator will be in a
Q6: Interpole flux should be sufficient to
A)neutralise the
Q7: D.C. generator generally preferred for charging automobile
Q8: In a D.C. generator the number of
Q9: Permeance is the reciprocal of
A)flux density
B)reluctance
C)ampere-turns
D)resis tance
Q10: In D.C. generators the polarity of the
Q11: The e.m.f. generated in a D.C. generator
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