a) Remain same b) Become four times c) Double d) Becomes half Ans: (a)
a) Current in the armature will increase b) It will run at its normal speed c) Speed of motor will be reduced d) Speed of motor will be high Ans: (d)
a) D.C. shunt motor b) Induction motor c) D.C. series motor d) A.C. series motor Ans: (c)
a) Clockwise b) Anti-clockwise c) None of these d) Either (a) or (b) Ans: (b)
a) Motor b) Generator c) Transformer d) Mercury are rectifier Ans: (a)
a) Increases slightly b) Decreases slightly c) Becomes double d) Becomes half Ans: (b)
a) Decreases/increase b) Increase c) Remains unchanged d) Becomes very high Ans: (a)
a) Increases b) Decreases c) Remains unchanged d) Increases very much Ans: (b)
a) Increase acceleration time b) Reduce armature heating c) Prevent voltage dip in the supply mains d) Decrease starting torque Ans: (b)
a) Decrease b) Increase c) Remain unchanged d) Increase excessively Ans: (b)