# EMF Formula

#### Goldenwind

I'm trying to deal a problem using this formula, but I'm unclear as to what dl represents (Or if it is the same as dx in most integrals, then in that case I don't know what the lowercase L is)

$${\cal{E}} = \int_{a}^{b} \vec{E} \cdot \vec{dl}$$

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#### Dick

Homework Helper
Along a general curve l(t)=(x(t),y(t)), dl=(x'(t)*dt,y'(t)*dt). So if E=(Ex,Ey) that becomes Ex*x'(t)*dt+Ey*y'(t)*dt.

"EMF Formula"

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