What is a Combination Circuit?
Combines series and parallel circuits.
Total R (RT) is referred to as the total equivalent resistance (REQ) of the circuit.
The Rule: Remember what you learned about seri
Parallel Series Circuits
What is a parallel circuit?
A circuit with two or more paths for current to flow.
Where do you use a parallel circuit?
Anywhere that you need
* The same Voltage, supplied from
* The same power supply, to
* More than on
Work and Energy
Work refers to an activity involving a force and the movement of that force over a
* Symbol is W
* Expressed in Joules or J
* Equation: W = F * d
Example A force of 20 newtons pushing an object 5 meters in th
Power plants and Electricity in the United States
Work = Force * distance or W = F * d
Remember to include your base units, reference your Quantity table or note.
Show just your work and the answer.
How much work is done when 1200 N moves
3-phase power leaves the generator and enters a transmission substation.
The substation has large transformers
Converts power up to 155,000-765,000 volts
Transmits up to 300 miles.
Goes to transmission line
Efficient Energy Conversions
Various forms of energy include:
When we use energy, we convert it.
Energy conversion is never 100% successful. In other words, not all the energy mean
o Allmatteriscomposedof ,thebasic
o Thesmallestparticleofasubstancethatstillhasallofits is
o Mattercomposedofasingletypeofatomiscalledan .
Scientists and Inventors in Electricity Notes
1. Benjamin Franklin - His kite experiment demonstrated that lightning is electricity.
He was the first to use the terms positive and negative charge.
2. James Watt - Thought that the steam engine
Circuit diagrams show the connections as clearly as possible with all wires drawn neatly as
The actual layout of the components is usually quite different from the circuit diagram and
this can be confusi
Current in a wire travels at the speed of light (186,000 miles per second).
Movement is occurs due to free electrons hopping from atom to atom.
Negatively charged particles are drawn towards positively charged particles.
Electrical Quantities and Units
In this chapter
Electrical Units of Measurement
Insulators Materials that offer high resistance to current.
o Wood, plastics, glass, paper.
Semiconductors Materials which