Direct Current (D.C.):

• The graph of direct current is represented as a straight horizontal line above the time axis, indicating a constant value. The current flows in only one direction (does not change polarity).
• The value of the current remains constant over time, making it suitable for devices that require a stable voltage supply, such as batteries or electronic circuits.

Alternating current (A.C.):

• The graph of alternating current is represented as a wave that oscillates above and below the time axis, indicating that the current periodically reverses direction( changes polarity).
• The typical representation is a sine wave, indicating that both the magnitude and direction of the current vary over time.