do now! have a look through your test and fill in the front of your “tests folder”. can you then...
TRANSCRIPT
Do now!
Have a look through your test and fill in the
front of your “Tests folder”. Can you then write a target for the next topic under the target sheet for the inheritance module
Stand up!
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Electricity
Today’s lesson
• Understand that current is the rate of flow of charge
• Looking at current in different circuits
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cell
energy
electron
lamp
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cell
energy
electron
lamp
Can you copy this please?
Electrons
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Hi, I’m Jack the electron.
Coulomb of charge (electrons)
Think of it as a “bag of electrons” (containing 6000000000000000000 electrons!)
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Current
The number of Coulombs flowing past a point in the circuit every second.
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A
I’m counting how many
coulombs of electrons go
past me every second
1 Amp = 1 coulomb per second
Current
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Let’s build some circuits and investigate current.
Stand up!
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In a series circuit
Current is the same at any point in the circuit
2.5 A
2.5 A 2.5 A
2.5 A
In a series circuit
Current is the same at any point in the circuit
2.5 A
2.5 A 2.5 A
2.5 A
☺Can you copy this please?
In a parallel circuit
The current splits (total current stays the same)
2.5 A
2.5 A
1.25 A
1.25 A
In a parallel circuit
The current splits (total current stays the same)
2.5 A
2.5 A
1.25 A
1.25 A
☺Can you copy this please?
Milliamps!
1 A = 1000 mA
1 mA = ?
Milliamps!
1 A = 1000 mA
1 mA = 0.001 A