Basic Electrical Questions and Answers

16. When a 3 phase alternators supplies resistive load, armature reaction flux will be

  1. At 90 Degree with the field axis
  2. At 45 Degree with the field axis
  3. Along the axis of the field
  4. None of the above
At 90 Degree with the field axis

17. Relation between the direction of current flow, magnetic field and mechanical force developed in a conductor is given by

  1. Maxwell’s cork screw rule
  2. Right hand grip and thumb rule
  3. Fleming’s left hand rule
  4. Fleming’s right hand rule
Fleming’s left hand rule

18. “Earthing” is necessary to

  1. protect human being and  machine 
  2. machine winding
  3. protect birds from current
  4. all of the above
protect human being and  machine 

19. A solenoid coil must have its

  1. length and breadth equal
  2. length greater than breadth
  3. breadth greater than length
  4. none of the above
length greater than breadth

20. For accurate measurement of D.C. voltage, which type of instrument will be preferred?

  1. M.C. Type
  2. M.I. Type
  3. Electro Dynamic Type
  4. None of the above
M.C. Type

# Top 20 Basic Electrical Questions and Answers in English

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