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Homework Help: Find the maximum voltage of an AC generator

  1. Oct 19, 2015 #1
    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.

    Attached Files:

  2. jcsd
  3. Oct 20, 2015 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    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?

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