In D.C. machines the residual magnetism is of the order of________?
A10 to 15 per cent
B20 to 25 per cent
C50 to 75 per cent
D2 to 3 per cent
Correct answer
D. 2 to 3 per cent
Explanation
The correct answer is 2 to 3 per cent.
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Study 130 Electrical Engineering MCQs with correct answers and explanations.
Correct answer
D. 2 to 3 per cent
Explanation
The correct answer is 2 to 3 per cent.
Correct answer
B. 0.5
Explanation
The correct answer is 0.5.
Correct answer
C. to reduce the sparking
Explanation
The correct answer is to reduce the sparking.
Correct answer
C. Fleming’s left-hand rule
Explanation
The correct answer is Fleming’s left-hand rule.
Correct answer
B. in series with armature winding
Explanation
The correct answer is in series with armature winding.
Correct answer
D. up to 5 H.P
Explanation
The correct answer is up to 5 H.P.
Correct answer
C. Series motor
Explanation
The correct answer is Series motor.
Correct answer
C. it limits the starting current to a safe value
Explanation
The correct answer is it limits the starting current to a safe value.
Correct answer
E. Single phase induction motor (split phase start or induction run motor)
Explanation
The correct answer is Single phase induction motor (split phase start or induction run motor).
Correct answer
A. Differentially compounded motor
Explanation
The correct answer is Differentially compounded motor.