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Voltage = ?Current = 3 ampsResistance = 10 ohms V V C R C R
Ohm’s Law• Resistance= Voltage (volts) (ohms) Current (amps) R= 10 ohms V= 20 volts Current= ? V 10= 20 C Current = 2 amps
Ohm’s Law• Resistance= Voltage (volts) (ohms) Current (amps) Resistance= ? Voltage= 60 volts Current= 2 amps V
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
Electrical Flow [02:04]
resistor• uses electrical energy as it interferes w/ flow of charge
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
2 types of circuits: series & parallel Series and Parallel Circuits [00:36] .
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
more branchesseveral paths added- for current advantage decreased to take resistance if 1 light goes out- other stay lit
comparing circuits slideshow series circuits vs. parallel circuitsYouTube video-Series and Parallel Circuits