In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be__________________?

A. ball bearings
B. bush bearings
C. magnetic bearmgs
D. needle bearings

A. electromagnets
B. permanent magnets
C. both A. and B.
D. none of the above

A. the brushes of opposite polarity should track each other
B. the brushes of same polarity should track each other
C. brush position has no effect on the commutator grooving
D. None

A. 150 V
B. 175 V
C. 240 V
D. 290 V

A. only if the resistance of the field circuit is less than critical value
B. only if the resistance of the field circuit is greater than critical value
C. irrespective of the value of the resistance in the field circuit
D. none

A. E/2
B. 2E
C. slightly less than E
D. E