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Stefan Grove
Here are my notes for Lesson 2:
Chapter 2 Section 1:
- All matter is composed of atoms
- An atom is made up of neutrons, protons, and electrons
- Nucleus (Center of an atom) is made up of protons and neutrons
- Electrons = Negative charge
- Protons = Positive charge
- Neutrons = No charge
- If the atom has same number of protons and electrons, it is said to be "stable"
- resistance is the measure of resistance to the flow of electricity measured in ohms
- Current = Measure of the amount of electric charge passing a point in an electric circuit per unit of time
- 3 basic measurements of electricity =
- Voltage (V)
- Current (I)
- Resistance (R)
- Ohm's law
- V=IR (Voltage = Current times resistance
- Variations of above: current = Voltage divided by resistance
- Variations of above: Resistance = Voltage divided by current
Chapter 2 Section 2:
- Analog circuit = Circuit that carries a voltage that is either continuous or changing
- Analog in 2 categories:
- Series
- Parallel
- Digital Circuit = transmits information, can transmit binary values in the form of an on or an off signal
- Power Plant, Step-up Tansformer, Tower, Transmission Substation, Distribution Substation, Transformers, Home
Review:
- Voltage is the measure of electromotive force in the electronic circuit
- Resistance is the measure of the opposition to the flow of electricity
- Electricity is the flow of free electrons from atom to atom
- Current is the measure of the amount of electric charge passing a point in an electric circuit per unit of time
- If an atom has more protons than electrons it is said to be positively charged
- Analog circuits transmit voltage to components
- Alternating current is current that flows in both directions
- Electricity loses energy over long distance so low voltage transmissions help to extend voltage over a long distance, false
- Electronic circuits can be broken down into to types: Analog and Digital
- A digital circuit transmitts information in two values on (1) or off (0), True
