A) Copper loss B) Eddy current loss C) Bearing friction loss D) Windage loss. Ans : (A)
A) Same as the polarity of the main pole that follows in the direction of rotation B) Same as the polarity of the main pole that precedes in the direction of rotation C) Always S D) Always N. Ans : (B)
A) dc to ac B) ac to dc C) both (A) and (B) D) none of these. Ans : (C)
A) depends only on the lamination thickness B) varies as 1.6 power flux density C) varies as the inverse of flux density D) can be minimized by laminating the armature. Ans : (B)
A) the voltage generated will be zero B) field winding will burn C) machine will generate maximum power D) machine will generate maximum voltage. Ans : (A)
A) A = B x C B) C = A + B C) B = A x C D) C = A x B. Ans : (A)
A) Shunt generator B) Series generator C) Both have identical regulation. Ans : (A)
A) Cross-magnetizing B) Demagnetizing C) Magnetizing D) Non-magnetizing. Ans : (A)
A) flux density B) square of armature speed C) square of the supply current D) supply voltage. Ans : (B)
A) power output may exceed the rated power B) winding may burn out C) will start’s ‘hunting’ D) will not build up. Ans : (D)