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Homework Help: Ideal circuit with 4 resistances and one emf.

  1. Nov 11, 2008 #1
    1. The problem statement, all variables and given/known data
    In the figure below, R1 = 5.50 , R2 = 18.0 and the ideal battery has an emf E= 12.0 V.
    (a) What is the size and direction of current i1? (Take right to be positive.)

    (b) How much energy is dissipated by all four resistors in 1.00 min?

    2. Relevant equations
    I = E/R
    resistive dissipation
    P=i2R
    P=v2/R
    3. The attempt at a solution
    I am having trouble trying to find the equivalent resistance to find the current i1. I know it should be in the positive direction to the right.

    For part b should i just add up the dissapations for the 4 resistors?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 11, 2008 #2
    What figure? =D
    For part b you are correct, P = I2R is the energy dissipated on that resistor, so you'd have to find the corresponding value of the current going through a particular resistor.
     
  4. Nov 11, 2008 #3
    I forgot to attach it but i figured the problem out anyway.
     
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