Electrical Theory 1
Define an electron.
A negatively charged particle within an atom.
A 12v battery has how many cells? what are their voltages per cell?
6 cells, 2.1 volts per cell
The unit of measurement for electrical power is called?
Watts
Voltage source: example, Battery
When tracing a circuit, it is important to trace from the battery to the load. True or False?
False, start at load and work your way back to the source voltage (battery)
What is a conductor?
Elements whose atoms have less than 4 electrons in their outer rings. example: Copper or Aluminum
When charging a battery, what is the best method?
Slow, low amp charge
If I know my resistance and amperage of a series circuit, how can I find the source voltage?
Multiply Amperage by the Ohms (resistance)
When testing for resistance on a component, the component must be _____________ from its power source.
Removed/taken out of the circuit
What is the expected charging voltage range we should see when charging?
13.5-14.5 volts
Theory of how electrons flow. Which one did we focus on?
Conventional Theory. The flow is from + to -
Give an example of battery maintenance?
Checking and adding water, cleaning terminals of corrosion, making sure battery in secured and clean
What is Voltage drop?
Measuring voltage on both sides of a load, you can see how much voltage was used to push that current through the load.
What are the 3 steps to checking current (amps) with a DVOM?
1. Move red lead to Amp/mA port
2. switch meter to DC amp setting
3. place meter inline with circuit.
What are the manufacturers clues they give us on a schematic?
Legends, wire color id, number id, components specs.
The "E" in Ohms Law stands for what?
Electromotive force = Voltage
The combination of distilled water and sulfuric acid in a wet cell battery is called?
Electrical energy can be converted into what 3 forms of other energy?
Heat, Light and Motion
What is another function the DVOM can do?
Frequency, Diode test, temperature, capacitance, RPM
What is the maximum voltage drop you should see on a battery cable to starter?
0.5v
The higher the temperature of a conductor, the higher the resistance. T/F?
TRUE. More heat increases the collisions of those free electrons trying to flow through a wire or conductor
Before charging a battery, what needs to be known?
Current state of charge and condition
A pictorial representation of a wiring circuit with components is called a what?
An electrical schematic
What is the average amp rating you should not exceed on a DVOM
10 amps
All voltage drops in a circuit should ___________ source voltage.
Equal