What is Joule heating: Definition and 23 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:
P
∝
I
2
R
{\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.
According to the Joule experiment, work can increase the temperature of a liquid. Is it possible to boil water simply by stirring it? How much energy would be required?
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...
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...
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...
Homework Statement
##\mathbf A##.Joules heating
Consider a metal in a uniform temperature in a static uniform electric field E.An electron experiences a collision, and then after a time t, a second collision. In the drude model , Energy is not conserved for collisions, for the mean speed of an...
Homework Statement
2. Homework Equations
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Consider the following circuit where:
$$R_A=330 k\Omega$$
$$R_B=220 k\Omega$$
$$C= 2.2 nF $$
$$v_1(t)=6u(t) V$$
$$ i_2(t)=-10u(t-t_2) \mu A$$
$$t_2 = 12 ms $$
All the currents go clockwise (with the obvious exception of the current source)...
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...
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...
Hi ,
How can I calculate the resistive heating occurring in the internal resistances of a solar cell ? Are ohm's law or the power dissipation relation P=RI2 applicable in this case ? if not the case how can we calculate the resistive heating there?
Thank you in advance for your help
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...
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...
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...
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.
Hello,
I am a high school student carrying out a physics experiment.
I created a short circuit in order to see how much heat different types of metals would release when a current is running through them (4.5 A). In my experiment, I tested three different types of metals: Brass, Stainless...
Ok so as fare as I understand the equation for Joule heating in a material with a DC current is I^2*R.
I am trying to calculate for the heating of carbon fiber in an argon environment. Carbon fiber has a resistivity similar to graphite (roughly 5.0*10^-7) I am trying to calculate for 3.3VDc...
Hi all, some background info, thanks for reading and helping!
I'm working on a project, the portable device is to vaporize glycerol(300 C). In an attempt to maximize vapor production, I've decided to skip the experimentation and calculate the optimal specs for each part. Also pardon my...
Hello,
I have the following problem: I would like, from a tungsten filament which an electric current is imposed, find the temperature emitted from the filament (Joule heating) on ansys workbench.
I have to study a thermoelectrical , but I can not find any tutorial.
Does anyone have...
How can I accurately control the Joule Heating effect of a length of Tungsten wire to certain temperature ranges? The tolerance would have to be no more than a maximum of +/- 2°C.
Would I require alternating or direct current and/or any other associated instrumentation?
I have little or...
Homework Statement
I know the current distribution through a rectangular cross section of metal. It varies only with respect to y. I need to find a heating function for the metal. (This is only the relevant part of a larger problem).
Homework Equations
Q=I2R
The Attempt at a Solution
I...
Homework Statement
A solar panel (an assemblage of solar cells) measures 58 cm x 53 cm. When facing the sun, this panel generates 2.7A at 14V. Sunlight delivers an energy of 1.0 x 10^3 W/m^2 to an area facing it. What is the efficiency of this panel, that is, what fraction of the energy in...
Homework Statement
The aluminum cable of a high-voltage transmission line carries a current 600A. The cable is 60km long, and it has a diameter of 2.5 cm. What is the power lost to Joule heating in this cable?
Homework Equations
Should I use the equation V=1/(4piEo)integral(dq/r) to...
I want to find the increase in the temperature of a resistor due to joule heating. I mean that if we apply some electrical power to a resistor then the electrical energy is converted to heat energy due to joule heating. The heat energy will increase the temperature of the resistor. Is it...
The experiment is joule heating and I'm trying to calculate the filament resistance.1.) mass of the calorimeter cup 49.5g
specific heat of the aluminum cup: 0.22 cal/kg*K
mass of calorimeter cup w/ water 232.5g
initial water temp. 20.5 C
voltage across heater 7.3V
current through heater 5A
final...