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Homework Help: Electricity Help !

  1. Mar 23, 2010 #1
    1. The problem statement, all variables and given/known data

    The power rating of a resistor is 0.256 W. If the value of the resistor is 210 Ω, what is the maximum current it can draw?

    2. Relevant equations

    3. The attempt at a solution
    I feel like I am missing a variable. Help Please !
  2. jcsd
  3. Mar 23, 2010 #2
    No, you have everything you need.
    Suppose the resistor draws a current I, what is the power it dissipates?
  4. Mar 23, 2010 #3
  5. Mar 23, 2010 #4
    still very confuesed
  6. Mar 24, 2010 #5
    now give a formula for the power with only I and R in it (wich are known).

    hint: ohm's law
  7. Mar 24, 2010 #6
    P=(IR)I ! ! ! ! Thank you so much !
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