The main cause of noisy solenoid are

  • AStrong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force
  • BUneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
  • CBoth of above
  • DNone of the above
Correct Answer : (C)

Both of above

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Tesla is a unit of


A permeable substance is one

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