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Generator is the comon name for the machines wich produces electric power .either it may be ac or dc..ac generators are called as alternators..
IN DC POWER GENERATION MACHINE WHICH PRODUCE POOWER IS CALLED GENERATOR IN AC POWER GENERATION MACHINE WHICH PRODUCE POWER IS CALLED ALTERNATOR
Generator generates only alternating current whereas an alternator generates all types of electric currents.
Generally, both the terms are used for emelectrical power generation/em but of a different type. br /If we talk about the emstrongDC power generation/strong/em, the machine which is producing power is stronggenerator/strong but in the case of strongemAC power generation/em/strong, the machine which is producing power is alternating in nature so the machine producing AC power is called an strongalternator/strong.
Alternators and generators are two devices which generate electricity. An alternator can be called a type of generator. An alternator is a charging system for cars that produces electricity. Generators are used in the production of large-scale electricity. br /Both alternators and generators convert mechanical energy into electrical energy. The main difference between them is in regard to what spins and what is fixed. br /1. In an alternator, electricity is produced when a magnetic field spins inside the stator (windings of wire). In a generator, on the other hand, the armature or windings of wire spin inside a fixed magnetic field to generate electricity.br /2.Generators have to be polarized after installation, there is no need for polarization in alternators.br /3.Alternator brushes last longer than those of generators. br /4. An alternator will not charge a dead battery and if you do try to charge it, there is a possibility that it will burn out. A generator, however, can be used for charging a dead battery.br /5. Alternators can fit into a small space, while generators are larger. br /6. Alternators conserve energy by using only the energy that is needed, while generators use all the energy that is produced.