Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Determine curren in a 1500 W water heater connected to 220 V

  1. Apr 14, 2008 #1
    A 1500 W heater is connected to 220 V. Calculate
    a) the current in the heater
    b) the resistance of the heater
    c) the termal energy provided by the heater in 1 hour
  2. jcsd
  3. Apr 14, 2008 #2
    Is 220V AC or DC?
    If AC;

    a) do you want the rms or peak current?
    b) the reactance or resistance?
    c) did you mean "thermal" energy?

    Either way, these question use the very basic formulas for power, voltage and current. Look up the most simplest formulas relating those quantities and attempt the question.
    c) tests your understanding of the fundamental definition of power...see what you can find.
  4. Apr 14, 2008 #3
    Don't know if it should be AC or DC...
    a) peak current
    b) resistance
    c) yes, sorry i meant thermal

  5. Apr 14, 2008 #4
    It'll probably be best if you list down the formula's you think you should use, and attempt it..we can tell you if your on the right track then..
  6. Apr 14, 2008 #5


    User Avatar
    Science Advisor

    Sounds like a DC problem to me, just because no other information was given (or at least given in your post)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook