Electric Circuits
A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be __________ V.

 36
 8
 2
 50

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Electric Circuits
Pure metal generally have

  low conductivity and zero temperature coefficient.
  low conductivity and high temperature coefficient.
  high conductivity and low temperature coefficient.
  high conductivity and large temperature coefficient.

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Electric Circuits
What is called the instantaneous value of an alternating current?

 The value of peak current at any instant.
 The value of alternating quantity at any instant.
 The value of peak quantity at any instant.
 The value of alternating frequency at any instant.

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