Magnetic Field and Forces 11/4

Here we can see the magnetic field surrounding the bar magnet.

Here we see how the magnetic flux of a closed surface is similar to gauess law for electric flux. integral of b*dA =0

The unit for the magnetic flux is the webber.

Here we can see that the right hand rule still applies. and that force is equal to F=qVx B

A simple sample problem where we have a known magnetic field velocity and theta

A particle in a magnetic field is being affected by a magnetic force. notice how the force propels it forward. and the electric force bring it down,

A Heat Gun

This shows how in a magnetic field a particle will tend to move in a circle clockwise or counter clockwise depending on charge magnetic field and direction of velocity.

The velocity of the charge is also the current though the wire so the wire experiences a force up or down.

This explains the video we just saw that the current I through a wire some length L will experience a force if there is a perpendicular magnetic force.

all the forces around the loop cancel out.

The force on a hemisphere from a constant magnetic field can be found by splitting wire into tiny pieces of dL length. L=rtheta.