# Homework Help: Find the maximum voltage of an AC generator

1. Oct 19, 2015

### Jack01236

1. The problem statement, all variables and given/known data
The sinusoidal voltage output from the AC generator oscillates between 500 V and -500 V. The circuit for an ideal transformer is constructed with a generator, transformer and a 30 Ω resistor . The generator makes 4 loops with the transformer and the resistor makes 9 loops with the transformer (the figure does not show these loops accurately). What is the maximum voltage across the resistor R ?

What is the peak or maximum power dissipated in R?

2. Relevant equations

V=IR B=unI Pdiss = I^2/R or P=IV
3. The attempt at a solution
I've attempted to find the current first, given that V is 500 V and R is 30 ohms, however I'm not sure this is the correct current value to use. Is the correct number of turns equal to 13, or is it just 9? Once I have the correct I value, I can use this to find part 1, then use that answer to find part 2.

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2. Oct 20, 2015

### SteamKing

Staff Emeritus
Transformers have two sets of coils: the primary set and the secondary set.

What's the purpose of putting a transformer in an AC circuit?

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/transf.html