Science Equation             Name Alternating Current       Equation I = I 0 sin ( ω ⁢ t + φ )       Definition of terms I = current, I0 = amplitude, ω = frequency, t = time, φ = an arbitrary phase       Comments   If an electric current is of the above from, then it is said to be alternating. Most electric and magnetic devices use alternating currents for two reasons: it is easy to change the voltage by means of transformers, and modulation of the signal can allow for transmission of information.       References Electromagnetism: Principles and Applications , P Lorrain, D R Corson, W H Freeman and Co., 1978         [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] Download | Contact | About

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