The Index consists of liquid United States dollar-denominated, high yield corporate bonds for sale in the United States, as determined by International Index Company Limited. HTG is based in Boston, MA.
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. Most of the digital electronics that you build will use DC.
DC vs AC Motors. DC or direct current motors work in particular situations whereby the speed of the motor needs to be externally controlled. On the other hand AC or alternating current electric motors are used in a completely different process drawing upon the kind of ac motor being used.