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A motor is a machine that converts other forms of energy into mechanical energy, therefore creating motion.
A generator converts mechanical energy into electrical energy via the method of magnetic induction.
You should probably check up Michael Faraday and Lenz. Or maybe look in a HSC Year 12 text book like Jacaranda.
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RossA transformer converts voltage and current to different values, but keeps input power equivalent to output power (minus some small value of losses). Thus the input to a transformer is electric energy, and the output is electric energy of about the same magnitude.
A generator takes kinetic energy and converts it into electric energy.
A motor takes electric energy and converts it into kinetic energy.
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Difference between a generator and a motor?
A generator converts kinetic energy into electrical energy; a motor converts electrical energy into kinetic energy.
What is the problem with using an electric motor to run a generator stepped up with transformers that is used to run the motor and give electricity for other uses?
It's all to do with the conservation of energy. The output power of the transformer cannot be greater than the input power from the motor used to drive your generator! In fact, it will be significantly lower than the power of your first motor due to the efficiency of the motor, of the generator being driven by that motor, and of the transformer. So if you then try to run the original motor from the output of your transformer, the energy-losses will simply accumulate, and the motor will not be able to run!
Why Back EMF occur in only dc motor?
It doesn't. It exists in all electrical machines, d.c. or a.c., motor, generator, or transformer.
Will using a transformer to convert 230V to 12V DC consume more energy than using a few capacitors and resistors without a transformer?
no, the transformer is much more efficient <><><> HOWEVER- a transformer only changes the voltage of AC current- it does not change it to DC. You will still need diodes or rectifiers. You can also use a motor/generator- a 230v AC motor turns a 12 v DC generator.
Difference between synchronous generator and synchronous motor?
ASYNCHRONOUS is a mode whereby events happens irregardless of control. SYNCHRONOUS are this same events but controlled by a timing and/or control
