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Alternating Current Theory and Application
Sample test questions for Underground Mine Electrical Certification


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Question 1 of 5

1.  Current changing from 4 to 6 amperes in 1 second induces 40 volts in a coil.  Its inductance equals:

Choices:
  1. 40 milli-Henries
  2. 4 Henries
  3. 6 Henries
  4. 20 Henries