A transformer for an answering machine takes an AC voltage of 170V (peak-to-peak or maximum) as its input and provides 7.8V (rms) as its output to the answering machine.
1. What is the rms equivalent to this peak-to-peak voltage?
2. Compute the turn’s ratio between the primary and secondary.
3. When not answering, the machine uses a maximum power of 5.0W. What is the current (rms) drawn from the170V line?