INTRODUCTION TO AC CIRCUIT.

An AC (alternating current) circuit is one in which the current periodically reverses direction, unlike DC (direct current) where current flows in one direction. AC circuits typically consist of resistors, capacitors, and inductors. The voltage and current in these circuits vary sinusoidally with time. Key parameters include amplitude, frequency, and phase. Impedance, which combines resistance and reactance, governs the circuit's behavior. AC circuits are widely used in power distribution systems due to their efficiency in transmitting electricity over long distances.

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