# Induced EMF Moving Current Loop

1. Dec 8, 2011

### jegues

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

See figure attached.

2. Relevant equations

3. The attempt at a solution

I'm having some confusion about the negative sign within this problem.

If you compute the curl of the expression shown in the figure you'll find that it's equal to,

$$-10v_{0} \hat{k}$$

But if we take the direction of the normal of the surface to be

$$-\hat{k}$$

so it points in the same direction that negative sign in his solution should go away, correct?

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2. Dec 8, 2011

### Spinnor

In the problem they tell you the line integral is in the counter-clockwise direction, the minus sign just means the current flows clockwise.

Hope this helps.

3. Dec 9, 2011