- #1
henryc09
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Homework Statement
1) a circuit is composed of a square wire of side length l, mass m,
resistance R and thermical capacity c. It is placed on the xz plane,
with corners at the points (0,0), (0,l), (l,0), (l,l). The magnetic field
is 0 for positive values of z, aligned along the y-axis and with absolute
value B for negative values of z. The circuit is left falling freely in
the gravitational field. Describe its temperature as a function of
time (not forgetting that in the beginning only one of the horizontal
wires with current feels the magnetic field!)
Homework Equations
[tex]\Delta[/tex]Q = mc[tex]\Delta[/tex]T
The Attempt at a Solution
I'm not really clear on why the temperature would be changing at all. Gravitational energy would be changed to kinetic energy as it falls. I suppose that as it falls the magnetic flux through the circuit changes and induces a voltage but I'm confused to what exactly this would do, and how it would affect temperature.
Any help would be appreciated!