Voltage (U) is how much electrical energy each electron is carrying.
Measured in Volts (V) with a voltmeter
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Current
A current (I) is how many electrons flow past every second.
Measured in Amps (A) with an "ammeter" (amperemeter)
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Learning goals 2.4
I can…
explain the basic components necessary for building a simple circuit.
draw circuit diagrams by using the circuit symbols.
explain the advantages and disadvantages of a series circuit.
calculate the current or voltage at various points in a series circuit.
explain the advantages and disadvantages of a parallel circuit
calculate the current or voltage at various points in a parallel circuit
use an ammeter or voltmeter to properly measure the current or voltage at a certain point in a circuit.
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Key words
wire
power source
batteries
switch
lamp
bell
Volt meter
Ammeter
motor
LED
series circuit
parallel circuit
consumption
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Basic circuit
Copper wire connects the voltage source to the device and back again. When the switch is closed the electricity can flow through the wire and light the bulb.
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Drawing a circuit
These symbols make drawing circuits easier
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2.4 Circuits
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2.4 Circuits - series
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2.4 Circuits - Series
All components are in the same loop, end to end.
There is only one way the current can flow
Same current throughout the entire circuit
Voltage is shared by all components in the circuiekst
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2.4 Circuits - Parallel
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2.4 Circuits - Parallel
Multiple loops or paths for the current to flow through
Currents is divided through every pathway
Voltage is the same for all components
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-Voltage same for all components
-Current is divided
-Current only divides equally if components are the same
Lesson duration is: 45 min
