Biot-Savart and a Rectangular Loop

1. Oct 29, 2014

mathguy831

1. The problem statement, all variables and given/known data

Consider the figure on the right. Wire 1 is oriented along the y axis and carries a current I1. A rectangular loop located to the right of the wire in the xy-plane carries a current I2. Find the magnetic force exerted by wire 1 on the top wire of length b in the loop labeled, "Wire 2" in the figure.

2. Relevant equations

Biot-Savart Law

3. The attempt at a solution

I'm not sure where to begin. I've never worked with a problem like this before, only the basic problems.

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2. Oct 30, 2014

rude man

Remember dF = i dl x B ?
i = current
dl =differential length expressed as a vector.
For B try ampere's law. Forget Biot-Savart.

3. Oct 30, 2014

mathguy831

Okay, I tried this. Does it look right?

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4. Oct 30, 2014

rude man

It's too late tonite for me to check it in detail but your approach is spot-on.