Introduction to Electrical Systems Flashcards
the flow of electrical power of charge
Electricity
the word “electricity” is sometimes used to mean?
electrical energy
- also called as electromotive force
- the force that makes electrons flow
- indicated by a unit known as ‘V’
Voltage (V)
- the rate at which electrons flow past a point in a complete electrical circuit
- its international unit is: Ampere or amp
Current (I)
- the measure of the opposition to current flow in an electrical circuit
- measured in “ohms”
Resistance (R)
What symbol in Greek letter symbolizes the international unit ohms?
Omega
the various factors that affects resistance in electrical components
- material’s conductivity
- length
- cross-sectional area
- temperature
the rate at which an electrical circuit transfers electrical energy
Power (P)
the SI unit used for power? it is also defined as one joule per second.
Watt (W)
What are the practical applications of Ohm’s Law?
- Determine wire size
- Circuit protection: determine rating of circuit breakers
- Voltage regulation
- LED lighting
AC stands for?
Alternating Current
An electric current that reverses direction periodically and commonly used in homes and businesses.
Alternating Current (AC)
An electric current that is generated by power plants and transmitted over long distances.
Alternating Current (AC)
DC stands for?
Direct Current
An electric current flowing in one direction only, and is commonly used in batteries and electronic devices.
Direct Current (DC)
