Explain How the motion of the blades enables a generator to produce electricity.?
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as the blades are rotating the shaft of the generator is also rotating. there are windings on the rotor shaft which moves relative to the stator windings. the rotor windings are supplied with dc current so the magnetic poles are formed on the rotor. since these magnetic poles of rotor are moving with respect to the stator windings there is a change in flux. so according to the Faraday’s law of electromagnetic induction the ac current is produced in the stator winding. this current is drawn through the stator winding terminals.
for detail read faraday’s law of electromagnetic induction. in most of the cases the speed of the generator shaft is kept around 1440rpm.