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Ohm’s LawOhm’s LawThis presentation is designed to giveyou the basic principles of Ohm’sLaw
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Learning Objectives- UponLearning Objectives- Uponcompletion of this lesson…completion of this lesson…Students will know the various variables ofOhm’s Law and what they signifyStudents will know the relationships of thevariableStudents will know how to compute themissing variable given the other two
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V= VoltageV= VoltageVoltage is the amount of work done per unitof chargeVoltage is measured in Joules per CoulombIt is often thought of as the amount of“energy” being appliedThe unit applied is “Volts/V”
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I= CurrentI= CurrentCurrent is the flow of electrical chargethrough a systemCurrent is measure in amperes, which isequivalent to 1 coulomb per secondThe unit applied is “Amperes/Amps”
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R=ResistanceR=ResistanceResistance is the opposition to the pass ofthe electrical current.Resistance is caused by objects such aslights or switches being applied to a circuitResistance is measured in ohmsThe unit applied is “Ohms/Ω”
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Solving for “V”Solving for “V”• Cover “V”• Remaining formula is “I x R”• Meaning as current or resistance increasesthe voltage will increase• Giving voltage a direct relationship to theother two variables
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Solving for “I”Solving for “I”• Cover “I”• Remaining formula is “V/R”• Meaning as voltage or resistance increasesthe current will decrease• Giving current an inverse relationship to theother two variables
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Solving for “R”Solving for “R”• Cover “R”• Remaining formula is “V/I”• Meaning as current or voltage increases theresistance will decrease• Giving resistance an inverse relationship tothe other two variables
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Ohm’s Law Basics RecapOhm’s Law Basics RecapVoltage is directly related to current andresistanceCurrent and resistance are inverselyrelated to the other variablesUse the pie chart to solve for missingvariables in a circuit
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Practice:Practice:With a partner fill in the missing values from the table.With a partner fill in the missing values from the table.20 V 0.2 Amps ? Ω120 V 5 Amps ? Ω240 V ? Amps 4 Ω? V 0.4 Amps 8 Ω9 V ? Amps 0.3 Ω
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