A) 2 B) 4 C) 8 D) 12. Ans : (B)
A) armature rotor B) main body C) commutator D) yoke. Ans : (A)
A) is independent of the rotor speed B) varies inversely as the square of the flux density C) varies inversely as the square of the lamination thickness D) occurs in magnetic as well as non-magnetic conductor materials. Ans : (D)
A) Bisector of GNA and MNA B) Magnetic neutral axis (MNA) C) Geometrical neutral axis (GNA) D) There is no hard and fast rule for this. Ans : (B)
A) 36 B) 24 C) 12 D) 6. Ans : (A)
A) increases terminal voltage B) increases armature cooling C) increasing input power of the prime move D) increasing armature resistance. Ans : (C)
A) reversing the field current B) increasing field current C) reversing the field current and also the direction of rotation. Ans : (A)
A) series parallel combination B) series C) parallel D) none of the above. Ans : (B)
A) will become less than 220 V B) will shoot upto a very high value C) will rise to 220 V D) will remain unaltered at 200 V. Ans : (B)
A) a very small voltage B) full rated voltage C) more than rated voltage D) zero. Ans : (A)