Aqa physics electromagnetismWatch
I have just been revising this lol! The motor effect is when a force is exerted on a current carrying conductor due to being placed in a magnetic field (use Flemings left hand rule)generator effect is when an emf is induced in a conductor due to a changing magnetic field(or due to the conductor moving through field) , use Flemings right hand rule, and basically in the generator effect a force acts on the electrons in the conductor (emf) creating a pd and if connected in a circuit an induced current flows
Generator effects - When a conductor (usually a wire) moves through a magnetic field and cuts through the field lines ( they often want you to mention this because the generator effect only applies if the wire cuts through the lines), a potential difference is induced in the conductor (basically the conductor gains a potential difference). If it is part of a complete circuit, the potential difference will cause a current to flow. You also need to know how to change the amount of potential difference - if you move the conductor more quickly. the p.d will be higher, if the magnetic field is stronger (they often want you to say a higher magnetic flux density) then the p.d will be higher, if the wire is longer, the p.d will be higher.
You also need to know how AC generators and dynamos work in terms of the generator effect.
Motor effect - If a current is flowing through a wire in a magnetic field and the direction of current is not parallel to the field lines, A force is exerted on the wire causing it to move. The direction in which it moves can be worked out using flemings left hand rule (again read up on this). The size of the exerted force n the wire can be increased by : using a strongee magnet (higher magnetic flux density), longer wire or greatee p.d/current in the wire.