Electric generator works on the principle …

Electric motor works the principle of magnetic effect of electric cirrent

Electric motors changes electrical enery to mechanical energy....and "mechanical energy means there is a force for mechanical work"... So , as we know for finding force we can use flemming's left hand rule or we can use right hand palm rule.(current carring conductor generate mag. field around it and also force is a particular direction)

An Electric generator is a device which is used to produce electric energy, which can be stored in batteries or can be directly supplied to the homes, shops, offices, etc. Electric generators work on the principle of electromagnetic induction. A conductor coil (a copper coil tightly wound onto a metal core) is rotated rapidly between the poles of a horseshoe type magnet. The conductor coil along with its core is known as an armature. The armature is connected to a shaft of a mechanical energy source such as a motor and rotated. The mechanical energy required can be provided by engines operating on fuels such as diesel, petrol, natural gas, etc. or via renewable energy sources such as a wind turbine, water turbine, solar-powered turbine, etc. When the coil rotates, it cuts the magnetic field which lies between the two poles of the magnet. The magnetic field will interfere with the electrons in the conductor to induce a flow of electric current inside it.