Explain the construction and working
of the following. Draw a neat diagram
and label it.
a. Electric motor
b. Electric Generator(AC)
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Answers
The basic principle of an electric motor is that an electric current that is placed in a magnetic field will experience force. This is what is created and harnessed in an electric motor.
The coil is used to carry the current and is usually bent into a loop. This goes past the magnetic field. Where it experiences force in opposite directions. These opposing forces create a turning movement to rotate the coil. This is otherwise known as torque.
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An AC generation is an electric generation that converts mechanical energy
into electrical energy in form of alternative emf or alternating current it works as the principals of Electromagnetic Inductor
working of an generator: Whne the armature rotate between the poles of the magnet an axis perpendicular to the magnetic field the flux which links with the armature changes continuously Due to this on emf is induced in the armature This produces on electric current through galvanometer & the slip rings & brushes.
The galvanometer rings between the positive & negative values This indicates that there's is an alternating current flowing through the galvanometer.
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