a) Slightly more than double b) Slightly less than double c) Slightly more than half d) Slightly less than half Ans: (a)
a) The supply terminals only b) The field terminals only c) The supply and the field terminals d) None of these Ans: (b)
a) Armature current decreases b) Flux gets reduced c) Line current gets decreased d) None of these Ans: (b)
a) Remains constant b) Decreases c) Increases d) None of these Ans: (c)
a) Zero b) Medium c) High d) Tending to infinity Ans: (d)
a) Shunt motor with commutating poles b) Series motor with commutating poles c) Series motor without commutating poles d) Compound motor without commutating poles Ans: (a)
a) It can run easily without load. b) It has poor torque. c) It has an almost constant speed. d) Its field winding consists of small number of thick wires. Ans: (d)
a) The armature b) The conductors c) The coupling mounted on the shaft d) The poles Ans: (c)
a) Force on N-m acting on the rotor b) Product of tangential force on the rotor and its radius c) The electrical power in kW d) Power given to the load Ans: (b)
a) Winding fault b) Excessive brush wear c) Excessive noise d) None of these Ans: (d)