Q. A transformer cannot raise or lower the voltage of a D.C. supply because (Solved)
1. there is no need to change the D.C. voltage
2. a D.C. circuit has more losses
3. Faraday's laws of electromagnetic induction are not valid since the rate of change of flux is zero
4. none of the above
- c. Faraday's laws of electromagnetic induction are not valid since the rate of change of flux is zero