1. Parallel Circuits & Voltage
D. Crowley, 2008

2. Parallel Circuits & Voltage
Wednesday, November 21, 2018
Parallel Circuits & Voltage
To know how adding more bulbs to a parallel circuit affects the voltage

3. Electricity Crossword
Complete the electricity crossword
Across: -
Cell
Circuit
Fuse
Nerves
Metal
Switch
Series
Down: -
Current
Conductor
Parallel
Resistance
Ammeter
Amps

4. Parallel Circuit Look at the following circuit+ -
branch 1
branch 2
How will the voltage differ across the components in branch 1 and branch 2?

5. Parallel Circuits
In a parallel circuit, if a lamp or component breaks the components on the other branches keep working
Unlike a series circuit, the lamps stay bright if you add more lamps in parallel

6. Parallel
Your task is to investigate how voltage changes when measured across different components in a parallel circuit
Set up the following circuit, measuring the voltage across the lamps V1 V2
Voltmeter
Voltage (V) V1 V2 V3 V3

7. Explanation
Write an explanation for what you have found about voltage in a parallel circuit…
Voltage is a way of measuring how much energy each electron carries
Voltage stays the same in a parallel circuit – it’s the same which every branch you measure because each electron still carries the same amount of energy (the same voltage)

8. Electricity & You How does electricity allow us to move?
When you move your brain send electrical signals, called impulses which travel along our nerves
Electricity can harm us – electric shocks can burn the skin or even stop nerves working properly
Your body has a much higher resistance than a component like a bulb – this is why we don’t get shocked when touching a 12V circuit - however, mains electricity (230V) will shock you!

9. Quiz