magnetic effect of alternative current
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As the wire rotates in the magnetic field, the changing strength of the magnetic field through the wire produces a force which drives the electric charges around the wire. ... The changing direction of the force after every 180 degrees of rotation gives the alternating current.
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The magnetic effect of electric current is known as electromagnetic effect.
it is seen that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity.
this shows that electric current produces a magnetic effect.
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