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- 1. Ch. 2 Sec. 4Electrical Circuits
- 2. measured with unitvoltage voltmeter Voltcurrent ammeter ampresistance multimeter Ohm
- 3. Ohm’s Law• Resistance= Voltage (volts) (ohms) Current (amps) R=V V=C X R C
- 4. VC R
- 5. Voltage = ?Current = 3 ampsResistance = 10 ohms V V C R C R
- 6. Ohm’s Law• Resistance= Voltage (volts) (ohms) Current (amps) R= 10 ohms V= 20 volts Current= ? V 10= 20 C Current = 2 amps
- 7. Ohm’s Law• Resistance= Voltage (volts) (ohms) Current (amps) Resistance= ? Voltage= 60 volts Current= 2 amps V
- 8. basic features of a circuit:1. source of electrical energy eg. battery1. have device run by electrical energy (resistor) eg. light bulb1. connected by conducting wires & switch= used to open & close circuit closed- circuit complete open- circuit broken
- 9. Electrical Flow [02:04]
- 10. resistor• uses electrical energy as it interferes w/ flow of charge
- 11. Find the missing variable.• Resistance= Voltage (volts) (ohms) Current (amps) Resistance Voltage Current 75 volts 25 amps 100 volts 2 amps 2 ohms 80 volts 4 ohms 120 volts
- 12. 2 types of circuits: series & parallel Series and Parallel Circuits [00:36] .
- 13. series circuit only 1 path advantage disadvantagesfor current to take if 1 light goes more bulbs simple to out- added- build all go out greater resistance
- 14. seriescircuit
- 15. seriescircuitChristmastree lights
- 16. more branchesseveral paths added- for current advantage decreased to take resistance if 1 light goes out- other stay lit
- 17. householdcircuits-parallelcircuits
- 18. comparing circuits slideshow series circuits vs. parallel circuitsYouTube video-Series and Parallel Circuits
- 19. Series and Parallel Circuits [02:02]

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