JEE (Based on NTA Guidelines-IIT Engg.) Mains Physics Electromagnetic Induction & Alternating Currents-Alternating Currents Study Material (Page 1 of 2)

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Alternating Current

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Alternating current is known as AC current. In circuit direction of current is constantly reversed. In our house the electric current is alternating current. This current is comes from the power plant to our homes and offices. The direction of current is switching back and forth 60 times in a second. AC power is much more economical to produce and use than DC power. AC voltage over DC voltage is that can be easily converted from one voltage to other by means of transformer.

Symbol of Alternating…

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AC Voltage Applied to an Inductor, Figure for Power Supplied to an Inductor over Entire Cycle

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AC Voltage Applied to an Inductor

An ac source is connected to an inductor as shown in the figure. Let the voltage across the source be . Using the Kirchhoff՚s loop rule.

We have,

T…

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