This document discusses series circuits. It defines a series circuit as one where current has only one path through all of the resistors. It outlines three learning objectives: 1) identifying series circuits, 2) understanding relationships between voltage, current, and resistance in series circuits, and 3) computing missing variables given two others. The key concepts covered are that total resistance equals the sum of individual resistances, current is the same throughout, total voltage equals the sum of individual voltage drops, and examples are provided to demonstrate these principles.

1. Series CircuitsSeries Circuits
This presentation is designed to give
you a broad sense of series circuits

2. Learning Objectives- UponLearning Objectives- Upon
completion of this lesson…completion of this lesson…
Students will know what a series circuit
looks like
Students will know the relationships of
voltage, current and resistance in a series
circuit
Students will know how to compute the
missing variable given the other two in
regards to a series circuit

3. DefinitionDefinition
A circuit with only one path through all of
the resistors

4. Series CircuitSeries Circuit

5. Series CircuitSeries Circuit

6. R=ResistanceR=Resistance
Rt = R1 + R2 + R3
Rt = 8Ω + 16Ω + 24Ω
Rt = 48Ω
The total resistance of a series circuit is the
sum of the individual resistances

7. Ohm’s LawOhm’s Law

8. I=CurrentI=Current
It = I1 = I2 = I3
It = Vt/ Rt
It = 120 V/ 48Ω
It = 2.5 Amps
The total current of a circuit is calculated
using the total resistance and the total
voltage
Current is constant throughout the circuit

9. Voltage DropVoltage Drop
As the voltage goes through a resistor the
voltage leaving the resistor is smaller than
the voltage entering.
The amount of the voltage drop is
dependent on the value of the resistor

10. V=VoltageV=Voltage
Vt = V1 + V2 + V3
V1 = I1 x R1
V2 = I2 x R2
V3 = I3 x R3
The total voltage of a series circuit is the
sum of the individual voltage drops

11. V=VoltageV=Voltage
 V1 = I1 x R1
– V1 = 2.5 amps x 8Ω
– V1 = 20 Volts
 V2 = I2 x R2
– V2 = 2.5 amps x 16Ω
– V2 = 40 Volts
 V3 = I3 x R3
– V2 = 2.5 amps x 24Ω
– V3 = 60 Volts

12. V=VoltageV=Voltage
Vt = V1 + V2 + V3
Vt = 20V + 40V + 60V
Vt = 120V

13. Series Circuit RecapSeries Circuit Recap
Electricity must flow through all resistors in
order to complete the circuit
If a resistor is broken then the circuit cannot
be completed and all aspects will not work

14. Series Circuit RecapSeries Circuit Recap
Vt = Rt x It
Vt = V1 + V2 + V3
Rt = R1 + R2 + R3
It = I1 = I2 = I3

15. Practice:Practice:
Vt V1 V2 V3
Rt R1
12 Ω
R1
8 Ω
R1
5 Ω
It
2 Amps
I1 I2 I3