 Source of voltage difference ◦ Battery, outlet  At least one device that uses the electrical energy ◦ Radio, microwave, clock, etc  Conductor that connects the device to the source of the voltage difference ◦ wire

 Series Circuit- a circuit where the current only has one loop to flow through V- voltage difference provided by a power source R- device that uses electrical energy I- Conductor

 Parts of the circuit are wired together with the same current running through every part  If one part is disconnected, then no current will flow through the circuit ◦ Switch ◦ Broken light ◦ Christmas tree lights

 Calculate the flow of current through the following circuit 12-V Battery 6 Ω

 Calculate the flow of current through the following circuit I- 2 A 6 Ω 12-V Battery

 Calculate the total resistance of the circuit. 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12V

 Calculate the total resistance of the circuit. ◦ R total = R + R + R + R= 9 Ω 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12V

 Calculate the current leaving the battery. ◦ I= V/R 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Calculate the current leaving the battery. ◦ I= V/R I= 12 (Volts)/9(Ohms)I= 1.33A 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Calculate the current through each resistor 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Calculate the voltage drop through each resistor 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Calculate the voltage drop through each resistor ◦ R1, R2, R3R4 ◦ V= (2Ω) (1.33A)V= (3Ω)(1.33A) 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Calculate the voltage drop through each resistor ◦ V= (2Ω) (1.33A)V= (3Ω)(1.33A) ◦ V= 2.67voltsV= 3.99 volts 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Check your work 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 Check your work  = 12V 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V

 What happens to the current if a resistor is removed ◦ R= V= I= 2Ω2Ω 2Ω2Ω 2Ω2Ω 3Ω3Ω 12 V _____________

 Calculate the total resistance running through the circuit  Calculate the current leaving the battery  Calculate the current through each resistor 3Ω3Ω 4Ω4Ω 1Ω1Ω 10Ω 9 V

 Calculate the voltage drop through each resistor  Check your work 3Ω3Ω 4Ω4Ω 1Ω1Ω 10Ω 9 V