Electrical Engineering XYZ MCQs
Which of the following statement regarding ideal transformer is correct:
- For ideal transformer voltage regulation is 100%
- For ideal transformer efficiency is 100%
- Both of the above
- None of the above
Correct answer: 2. For ideal transformer efficiency is 100%
Explanation: An ideal transformer is a theoretical concept where the transformer operates without any losses, meaning there is no core loss (due to hysteresis and eddy currents) and no copper loss (resistance in the windings). Therefore, all the input power is converted to output power without any wastage, leading to an efficiency of 100%. Voltage regulation, which is the difference in secondary voltage between no load and full load conditions, is zero in an ideal transformer. This is because, ideally, there is no voltage drop across the transformer under any load condition. Hence, only the statement about efficiency being 100% is correct.