Define the following terms:
a. Alternating current (AC)
b. Direct current (DC)
c. Ammeter
d. Circuit breaker
e. Fuse
f. Motor control center (MCC)
g. Switch
h. Ampere
i. Ohm
j. Volt
k. Watt
a. Alternating current (AC) is the electric current that reverses direction periodically, usually 60 times per second.
b. Direct current (DC) is the electrical current that flows in a single direction through a conductor.
c. Ammeter is the device used to measure the electrical current in a circuit.
d. Circuit breaker is an electrical component that opens a circuit and stops the flow of electricity when the current reaches unsafe levels.
e. Fuse is a device used to protect equipment and electrical wiring from overcurrent.
f. Motor control center (MCC) is an enclosure that houses the equipment for motor control, including isolation power switches, lockouts, fuses, overload protection devices, ground-fault protection, and sometimes meters for current (amperes) and voltage.
g. A switch is an electrical device used to start, stop, or otherwise reconfigure the flow of electricity in a circuit.
h. Ampere (amp) is a unit of measure of the electrical current flow in an electrical circuit, similar to gallons of water flow in a pipe.
i. Ohm is a measurement of resistance in electrical circuits.
j. Volt is the electromotive force or a measure of current that establishes a current of one amp through a resistance of one ohm.
k. Watt is a unit of measure of electric power, the power consumed by a current of one amp using an electromotive force of one volt.
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