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# 6th grade ch. 2 sec. 4 electrical circuits

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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]