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)
Who discovered electromagnetic induction that is essential for AC power generation?
Michael Faraday
Who developed AC power systems and the Tesla coil, revolutionizing electricity distribution?
Nikola Tesla
He is an advocate for DC power and the one who developed the first practical electric light bulb, initiating the “War of the Current”?
Thomas Edison
High-voltage power lines that transport electricity over long distance
Transmission Lines
Transform voltage levels for safe distribution
Substations
Delivers electricity to homes and businesses
Distribution Lines
type of energy generated by the sun
Solar Energy
a common technology in harnessing solar energy
Photovoltaic
- harnessed by wind turbines
- typically located along coastlines, offshore, on mountains, and on fields
Wind Energy
natural resource of heat energy from within the Earth
Geothermal Energy
- harnesses energy of water moving from higher to lower elevation
- oldest and largest sources of renewable energy
Hydropower
- also known as “wave energy”
- a form of renewable energy that is harnessed through the movement of waves
Ocean Energy
- a form of renewable energy derived from recently living organic materials known as biomass
- used to produce fuels, heat, electricity, and products
Bioenergy
