AC Generator working principle in tamil скачать в хорошем качестве

AC Generator working principle in tamil

(Sinusoidal Voltage) A.C voltage or alternating voltage changes its polarity periodically and also changes its magnitude at every instant. A.C Current: (Sinusoidal current) An alternating current is a current which reverses its direction periodically and changes its magnitude at every instant. Alternator: An alternating current generator is called alternator. It works on the principle of electromagnetic induction. An alternator is also called as AC Generator or synchronous generator. Working principle of alternator: An alternator works on the principle of faraday’s law of electromagnetic induction. It states that when there is a relative motion between magnetic field and a conductor an e.m.f is induced in the conductor. Alternating voltages / current may be generated by two ways: 1.By rotating a coil in a magnetic field. 2.By rotating a magnetic field within a stationary coil. The quantity of voltages / current generated depends upon: *The number of turns in the coil. *Strength of the magnetic field The speed at which the coil of magnetic fields rotates. *It is seen that the induced E.M.F. varies as sine function of the time angle t. *This curve is known as sine wave and the E.M.F which varies in this manner is known as sinusoidal E.M.F. e = Em sinwt Where, e = Instantaneous voltage Em = Maximum voltage t = Angular velocity of the coil. The induced sinusoidal voltages produce sinusoidal current. These values are Im sinwt. i = Im Sin wt Where, Im = Maximum value of alternating current. Thank You for watching