Current Electricity Study Guide
Quiz – Wednesday October 24th 2008
Ms. Jones
1. Define Current Electricity
2. Define Current
- Flow of what moving charge?
3. Insulators vs. Conductors
- Which is used in current electricity?
4. Voltage – potential difference (energy) from the beginning to the end of a circuit (1 path)
- measured in volts
- How does voltage affect current?
5. Resistance – opposing force on a current
- Why do circuits have resistors? (which are poor conductors)
- How does resistance affect current?
- 4 factors that affect resistance
- Temperature, width, length, material
6. Circuits
- Parts of a circuit
i. energy source, wires, load (resistor), switch (in most)
- open/closed circuit
i. Which will produce electricity?
ii. How do you open and close a circuit?
7. Series Circuit – one path ( I bulb does not work current stops)
- uses
- Voltage is divided among the amount of resistors
- Current stays the same at all resistors (one path that they are all traveling on)
- Be able to draw and/or analyze a circuit
CURRENT STAYS THE SAME, VOLTAGE DIVIDES AMONG RESISTORS
Ex. Voltage = 6 volts
Current = 12 amps
8. Parallel Circuit – Circuit with more than one path ( one bulb does not work, current can still run through other paths.
- uses
- Voltage among resistors stays the same (separate path for each resistor)
- Current is divided among the amount of resistors (paths) – more than one path to follow
- Be able to draw and/or analyze a circuit
CURRENT DIVIDES AMONG PATHS, VOLTAGE STAYS THE SAME
Ex. Voltage 9 volts
Current 15 amps
- Know the symbols of a circuit
9. Fuses – why does a fuse melt?
REVIEW CLASS NOTES, LABS, WORKSHEETS, ONLINE TEXT 1.2
EXTRA HELP 218, MR. TWOREK 208– JUST ASK!
GOOD LUCK!!!