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ITI
Electrician
Electrician Set-1
DC Motors
2

DC Motors MCQ - Electrician (Set-1) with Answers

2) The back e.m.f, opposes :

current

applied e.m.f.

torque

terminal voltage

Answer is:

applied e.m.f.

DC Motors MCQ - Electrician (Set-1) with Answers

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Related DC Motors MCQ - Electrician (Set-1) with Answers

3) Back e.m.f. is developed in the armature due to :

current

supply voltage

intersection of the magnetic flux by the armature conductors

interaction of the two magnetic fields

Answer is:

intersection of the magnetic flux by the armature conductors

4) If in a shunt motor the applied e.m.f. is kept constant then on increasing the load, the shunt-field strength will become _____ its normal value.

less than

more than

equal to

zero

Answer is:

equal to

5) In a series motor, the magnetic field-flux stands :

proportional to armature current

equal to armature current

inversely proportional to armature current

constant

Answer is:

proportional to armature current

6) The speed of a series motor is very high at no-load because in such state :

back e.m.f. is larger

armature voltage is lesser

flux is very low

armature current is very low

Answer is:

flux is very low

DC Motors MCQ - Electrician (Set-1) with Answers

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