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Electrician
Electrician Set-1
DC Motors
63

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

63) The direction of rotation of a D.C. motor is determined by :

Fleming's right hand rule

Fleming's left hand rule

Ampere's right hand grip rule

Maxwell's cork screw rule

Answer is:

Fleming's left hand rule

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

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

64) Which rule is applied to identify the direction of motion of the conductor in DC motor ?

Fleming's right hand rule

Fleming's left hand rule

Cork's screw rule

Right hand thumb rule

Answer is:

Fleming's left hand rule

65) Which law is used to find the direction of emf produced in the rotor of a motor ?

Fleming's right hand rule

Fleming's left hand rule

Maxwell's cork screw rule

Lenz's law

Answer is:

Fleming's left hand rule

66) In D.C. motor the back e.m.f. is directly proportional to :

flux

speed

no. of armature conductors

no. of poles

Answer is:

speed

67) The turning (or) twisting moment of force about an axis is called as :

speed

momentum

torque

velocity

Answer is:

torque

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

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