Direct Current (DC) Basic Terms (LEVEL
A)
Ampere - correct answer - Unit of measurement used
to express the flow of electrons (electrical current)
- One ampere is a rate of flow of one coulomb (6.28 billion - billion electrons)
passing a given point in an electrical circuit per second
- In mathematical problems amperage is expressed by the letter "I"
Battery - correct answer - A device consisting of a
number of primarily voltaic cells (cells that cannot be
recharged) or secondary cells (cells that can be recharged) connected in series to
obtain a desired DC voltage
- A battery stores chemical energy and makes the energy available in the electrical
form
- Aircraft storage batteries are generally rated at 12 or 24 volts
Capacitor - correct answer - Electrical component used
to store electrical energy in the form of an electrostatic
field
- A capacitor is a device made of two parallel conductors separated by an insulator
Conductor - correct answer - Common building block
of electrical circuits that easily permits the movement of
electrons from an electrical source to a load and back to the electrical source with
a minimum of resistance
- A conductor's resistance depends on such factors as cross sectional area, length,
temperature, and conductor material
