The electric force is directed along…
E
The electric force acts on…
moving and stationary charges
What type of work can the electric force do?
non zero work
Distinctions between E and B
- The Magnetic force is perpendicular to B
- The Magnetic force acts on moving charges only.
- The Magnetic force does no work (no V).
For a moving charge in a magnetic field, Fb is proportional to:
q0, v, B
Fb is perpendicular to…
both v and B
Is cross product commutative?
No
Magnetic fields cannot do this. what good is it then?
Cannot change kinetic energy. Magnets deflect.
Relationship between magnetic field direction and field lines
Field direction is tangent to magnetic field lines at any point.
magnetic field form
closed loops
Magnet shapes
Bar, Horseshoe, C magnet
Compass points in what direction?
South pole of magnetic field.
Torque
A measure of a force’s ability to induce angular acceleration.
radial acceleration =
v^2/r
