1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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: Heat and electric current

  1. Mar 19, 2006 #1
    A 111 V electric iron draws 8.9 A of current. How much heat is developed per hour? Answer in units of J.

    P = IV
    P = U/t
    U = IVt
    U = 8.9(111)(60) = 59274 J

    Apparently I'm wrong and I don't know why.
  2. jcsd
  3. Mar 19, 2006 #2
    A = (C/s)

    You have 60 mins, your units have a missmatch.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Heat electric current Date
Filament lamp model (derivation) Aug 11, 2016
Electrical energy converted to heat in coil Mar 18, 2016
Heat generated in coil Feb 12, 2015
Phys Chem Heating water with electric current Sep 24, 2013
Heat produce by electric current Oct 24, 2012