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1. Is the power supply for a transformer AC or DC? Explain in detail why only...

1. Is the power supply for a transformer AC or DC? Explain in detail why only this type of power supply will work.

2. Some configurations with the iron core have low efficiency while others have high efficiency. What is the iron core doing to cause this? Be specific. (Hint: think about how a transformer works.)

3. For an ideal transformer the energy must be conserved, so the average power (P=IV) in the two circuits must be equal. Therefore, if you have a step-up transformer, what happens to the current in the secondary circuit as compared to the current in the primary circuit? If VP=4.00 V and VS=8.00 V for this ideal transformer, determine how IS compares to IP. Be quantitative. Show all work.

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