Describe the forces experienced by a current-carrying loop in a magnetic field and describe the net result of the forces
- Current in external magnetic field experiences a force described by with F = nBIlSinθ, a more general form of the above equation where n is the number of turns
- Direction is found with right hand push rule.
- Force is found on each side of the coil (max when flat) which rotates the coil to parallel (F = 0)
- Momentum carries the coil around and should be pushed back when reaching the other side.
- Direction of the current is reversed using a split ring commutator which reverses the force and allows the coil to continue spinning which creates continual rotation.