Question

1. For example, the generator can produces a DC EMF (constant sign voltage).  Explain how this differs from the generator in the simulation.

2.  What changes can you make in the simulation to maximize the voltage produced?

3.  Describe the similarities and differences between a generator and a motor

Answer 1

1.A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf. According to Faraday’s laws of electromagnetic induction, whenever a conductor is placed in a varying magnetic field (OR a conductor is moved in a magnetic field), an emf (electromotive force) gets induced in the conductor. The magnitude of induced emf can be calculated from the emf equation of dc generator. If the conductor is provided with the closed path, the induced current will circulate within the path. In a dc generator, field coils produce an electromagnetic field and the armature conductors are rotated into the field. Thus, an electromagnetically induced emf is generated in the armature conductors. The direction of induced current is given by Fleming’s right hand rule.

2. If your generator is a permanent magnet generator, then the output voltage, for all practical purposes, is fixed. Replacing the field magnets with stronger magnets would increase the voltage, but this is probably impractical.On the other hand, if your generator has field coils instead of magnets, a small increase in the excitation voltage results in a proportional change in the output voltage.

3.The motor and the generator are almost similar from the construction point of view, as both have stator and rotor. The main difference between the two is that the Motor is an electric device which converts electrical energy into mechanical energy.

The generator is vice versa of that motor. It converts mechanical energy into electrical energy.

Motor uses electricity while genertaor produces electricity.

Motor uses Fleming's Left Hand rule while generator uses Fleming's Right Hand Rule.