Direct current (DC) flows in one direction, while alternating current (AC) reverses its direction periodically. In India, where AC has a frequency of 50 Hz, it changes direction 100 times per second.
Elaboration:
Direct Current (DC): The flow of electric charge in a single direction, like from a battery.
Alternating Current (AC): The flow of electric charge that periodically reverses its direction, oscillating between positive and negative values.
Frequency: The number of cycles (full reversals) per second of AC.
Direction Change: In India, with a 50 Hz AC supply, each cycle involves a change of direction twice (from positive to negative and back to positive), resulting in a total of 100 direction changes per second.