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When the current flows in the same direction it is called 'direct current' or DC
The current derived from a cell or battery is unidirectional. So it is a DC source
It is represented in an electrical circuit as
The voltage V/s time graph for a DC source is represented as follows:
The +ve and -ve terminals are fixed
The current changes its direction after equal intervals of time
It is called alternating current
Most of the power stations generate AC current
It is represented in an electrical circuit as
The voltage V/s time graph for an AC source is represented as follows:
It has no fixed terminals as the current changes its direction after every half cycle.
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