If emf is a tupe of measure of energy, why is it called a force?

Practic end.

Why do people think that current moves from positive to negative?

Answer: convention.

>measure of energy
no, potential

>>7971877
which is a type of energy

>>7971877
No, it's a force field acting on charged particles. It has nothing to do with potential or energy.

>>7971884
en.wikipedia.org/wiki/Electromotive_force

Technically it's not energy either OP, it's energy per charge. I'm not sure where the name itself came from, but it's easy to see why the name isn't so bad. Forces and energy differences are intimately related. In one dimension, if a particle's energy as a function of position [math]E(x)[/math] is known, then the force acting on the particle at any point is:

[eqn]F(x) = \frac{dE}{dx}[/eqn].
This is easily generalizable to higher dimensions, so that:

[eqn]F_i = \frac{\partial E}{\partial x^i}[/eqn]
where [math]x^i[/math] is the i'th coordinate, [math]F_i[/math] is the i'th component of force, and i runs from 1 to n, where n is the number of dimensions.

So, given an induced EMF, you are also given the force applied to any single charge because the former contains all of the information of the latter. Just multiply by [math]q[/math] and take its gradient!

File: time travel device.jpg (14KB, 170x210px) Image search: [Google]

14KB, 170x210px

>>7971884
WAIT! WE HAVE FORCE FIELDS?!?
Yes, finally made it to the future after all those years sitting in that time-machine.