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.
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
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
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
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