Write some difference between ac and dc current

1.	Write some difference between ac and dc current
Answer» Direct Current:1) It is derived from a cell or a battery and is uni-directional.2) The positive and negative terminals are fixed.3) The voltage v/s time graph is represented by a stariaght line parallel to time axis. Thus the value of voltage or current remains constant with timeAlternating Current:1) The current changes its direction after equal intervals of time.2) It has no fixed terminals as the current reverses its direction after every half cycle.3) The voltage Vs time graph is generally represented by a sinusoidal curve.

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