Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of...
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Transcript of Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of...
![Page 1: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/1.jpg)
Parallel CircuitsFriday, April 4, 2015
![Page 2: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/2.jpg)
Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and
use GUESS to solve the following problem:
A handheld radio is powered by two 1.5 V battery. When the radio is turned on there is 40 ohms of resistance. How much resistance is in the circuit?
Upcoming dates: Tuesday, 4/7 – open note quiz (DATE CHANGE) Tuesday, 4/7 – last day to turn in missing electricity assignments Thursday, 4/9 – Electricity test (grade will go on the 6SW) Friday, 4/10 – End of 5SW
![Page 3: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/3.jpg)
Types of Electricity
Dynamic Static
Direct Current (DC)
Alternating Current (AC)
Series ComplexParallel
Unit Overview
![Page 4: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/4.jpg)
Resistors can be connected in series; that is, the
current flows through them one after another.
Series Circuits
![Page 5: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/5.jpg)
KirchhoffKirchhoff’’s Ruless Rules
Loop Rule: Loop Rule: The sum of the potential differences The sum of the potential differences (voltage) around any closed circuit loop is zero(voltage) around any closed circuit loop is zero..
![Page 6: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/6.jpg)
Resistor CircuitsResistor CircuitsSeries
1. 1. total resistancetotal resistance is the sum of the is the sum of the separate resistorsseparate resistors
RRTT = R = R11 + R + R22 + R + R33 + ... + ...
2. 2. currentcurrent is the same through each resistor is the same through each resistor
IITT = I = I11 = I = I22 = I = I33 = ... = ...
3. 3. total potential differencetotal potential difference is the sum of each is the sum of each
VVTT = V = V11 + V + V22 + V + V33 + ... + ...
In other words, in a series circuit,In other words, in a series circuit,resistance and voltage add,resistance and voltage add,but current stays the same.but current stays the same.
![Page 7: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/7.jpg)
Series Circuit Example
![Page 8: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/8.jpg)
Practice
![Page 9: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/9.jpg)
Unit OverviewTypes of Electricity
Dynamic Static
Direct Current (DC)
Alternating Current (AC)
Series ComplexParallel
![Page 10: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/10.jpg)
Circuit – In SeriesOnly one path
![Page 11: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/11.jpg)
Circuit – In ParallelMore than one path
![Page 12: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/12.jpg)
DirectionsUsing the items in your box create a parallel circuit
with three branches. Place a light bulb in each branch.
When all three light bulbs have illuminated do the following:
Disconnect a light bulb from one branch of the circuit. Record your observations.
Disconnect two light bulbs from two branches. Record your observations.
![Page 13: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/13.jpg)
What do you think?If a circuit has multiple branches will the
voltage, resistance, and current behave differently? Write your thoughts in your notes.
![Page 14: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/14.jpg)
![Page 15: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/15.jpg)
KirchhoffKirchhoff’’s Ruless Rules
Junction Rule: Junction Rule: the sum of all currents entering the the sum of all currents entering the junction must equal the sum of all currents leaving junction must equal the sum of all currents leaving
the junction.the junction.
![Page 16: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/16.jpg)
Parallel 1.1. reciprocal of the total resistance reciprocal of the total resistance is is
the the sum of the reciprocals of the sum of the reciprocals of the
separate separate resistorsresistors
1/R1/RTT = 1/R = 1/R11 + 1/R + 1/R22 +1/R +1/R33 + ...+ ...2. 2. total currenttotal current is the sum of the currentis the sum of the current
through each resistorthrough each resistorIITT = I = I11 + I + I22 + I + I33 + ... + ...
3. 3. potential differencepotential difference is the same is the same across across each resistoreach resistorVVTT = V = V11 = V = V22 = V = V33 = ... = ...
In other words, in a parallel circuit, resistance adds as reciprocals,
voltage stays the same, and current splits.
In other words, in a parallel circuit, resistance adds as reciprocals,
voltage stays the same, and current splits.
![Page 17: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/17.jpg)
![Page 18: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/18.jpg)
Practice
![Page 19: Parallel Circuits Friday, April 4, 2015. Unit 9: Electricity Friday, 4/3 Pick up a warm-up sheet of paper from the Physics bin and use GUESS to solve.](https://reader035.fdocuments.us/reader035/viewer/2022070412/5697bf741a28abf838c7fa04/html5/thumbnails/19.jpg)
Review