Explain working of an electric generator with its principles.
Answers
Principles ; Electric generator works on the principle of electromagnetic induction. Electricity is generated by rotating a coil inside magnetic field.
working; Working
The axle is rotated such that it moves in the clockwise directions that is AB moves up and CD moves down.
According to Fleming's Right Hand rule, the induced current is setup in the coil along B1-> AB -> BC -> CD -> B2. This means that the external current flows from B2 to B1.
After half a rotation, arm CD starts moves up and AB moves down.
According to Fleming's Right Hand rule, the induced current is setup in the coil along B2-> AB -> BC -> CD -> B1. This means that the external current flows from B1 to B2.
Thus after every half rotation of the coil, the current changes direction. This is called an AC current.
AC current(Alternating current) : Changes its direction after equal intervals of time. It is easier to transmit this current over long distances due to lesser loses and hence this is the current that is supplied to our houses from the electricity department.
Principle : Electromagnetic induction.
When a rotating conductor is placed in the magnetic field, the current is induced in the conductor.
Working :
Electric generator converts mechanical energy into electrical energy.
