Transformers

A transformer cannot raise or lower the voltage of a D.C. supply because

  • A. There is no need to change the D.C. voltage
  • B. A D.C. circuit has more losses
  • C. Faraday’s laws of electromagnetic induction are not valid since the rate of change of flux is zero
  • D. None of the above
Answer: Option C.
Explanation: 

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