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Types of Electricity

          (A)   Alternate Current (AC):

                 •    AC is an electric current which periodically reverses direction.

                 •    AC is used to deliver power to industries, houses, office buildings, etc.

                 •    AC Wave form from Utility electricity board is Sine Wave.
                 •    AC frequency in India is 50Hz and voltage is 230V.

                             +                           Sine Wave

                              Amplitude                                             time

          (B)   Direct Current (DC):

                 •    DC electric current flows in one direction only.
                 •    Direct Current is produced by the sources such as Batteries, fuel cells and solar cells/
                      Panel etc.

                 •    DC have a polarity (+) & (-).
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