Joule heating Definition and 9 Discussions

Joule heating, also known as resistive, resistance, or Ohmic heating, is the process by which the passage of an electric current through a conductor produces heat.
Joule's first law, also known as the Joule–Lenz law, states that the power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current:





{\displaystyle P\propto I^{2}R}
Joule heating affects the whole electric conductor, unlike the Peltier effect which transfers heat from one electrical junction to another.

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  1. B

    Motional EMF for loops of wire vs conducting plates

    I'm in an intro E&M class, and I'm trying to distinguish between Motional EMF for loops of wire and conducting plates. This question might be kind of silly, but are Eddy currents pretty much the same thing as induced currents in a loop of wire? More specifically, what I am trying to ask is if...
  2. D

    Joule heating effect - qualitative explanation

    Hi, I understand mathematically why using low resistance results in a greater heating effect. Could someone give an intuitive and microscopic picture of why the current contributes more to a greater power dissipation by the resistor rather than the resistance contribution to the power...
  3. Abimbola1987

    Joule's first law - kinetic energy of electrical current

    Dear Sirs, If I take this explanation as being true "The heat is generated on the microscale when the conduction electrons transfer energy to the conductor's atoms by way of collisions." So a "current" must have a quantum of kinetic energy going into the conductor (resistive element) and a...
  4. M

    Ansys Maxwell Contact Resistances

    Hello everyone, I am using Maxwell 16.2 with no chance to get an update. I want to do a 3D design Eddy Current Simulation to find out the Joule losses of my single phase GIS design. An important factor for the joule losses that I need to insert is the contact resistances of the several...
  5. J

    Heat transfer modeling

    Hello everyone, I was hoping to get some insight on a model I am trying to create. Quick background in case it is important, I am now working at a new internship I landed for the summer doing some modeling and what not on areas of physics I have never worked on before. It has also been a few...
  6. W

    What exactly is Joule's law of heating?

    Hi everyone, I'm struggling to understand what I think is a very basic concept: Joule's law of heating. Allow me to explain my confusion: We know that voltage can be expressed as: V = I · R And power can be expressed as: P = I · V Making power equivalent to: P = I2 · R According to my...
  7. Umar Awan

    Is it current or voltage that is fixed in transformer output

    In a transformers output, is it the current that is fixed or the voltage? I have been trying to resisitively heat some tungsten foil and I am stuck at trying to find out the amount of current I need in my transformers output. The problem I am facing is that I know that the tungsten resistivity...
  8. Z

    Heat Transfer by Nichrome wire and Steel

    Hello all. I want to do some experiment but I thought I would go over this theoretically before trying out and now I have a doubt. Homework Statement I have a driver which produces say 600mA. I connect the driver to one end of Nichrome Wire. And the other end of Nichrome wire is in contact...
  9. J

    Modeling technique for Joule heating

    Good Day, I am looking for mathematical modelling of Joule heating of a simple cantilever beam . Can anybody provide me good source of relevant material. Thanks in advance.