Silicon Valley star Thomas Middleditch is engaged to his girlfriend Mollie Gates, Us Weekly can exclusively confirm. PHOTOS: Celebrity weddings 2015.
Why, Alternating Current and Direct Current, of course! Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
Electric current can be either direct current (DC) or alternating current (AC). With DC, the direction of flow is constant. With AC, the direction of flow changes rapidl â¦ y from one direction to the other. + 19 others found this useful.