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Electricity and circuits

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by

Paul Sheffield

on 20 September 2017

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Transcript of Electricity and circuits

Do it now!
Can you draw these circuit symbols?
bulb
wire
switch
motor
cell
battery
Ammeter
Voltmeter
The symbols we need to know!
Investigating current
Build a series circuit with 1 cell and 1 bulb.
Measure the current
add a bulb
what happens to the current?
add a cell
what happens to the current?
Electricity and circuits
L.O
Symbols
Simple circuits
Current

Key ideas
Current
Coulomb
Ammeters go in series
Voltage
Potential difference
What is electricity?
What is current?
What is voltage?
List everything you have used today that needs electricity
Current?
Coulomb= unit of charge (6250000000000000000 electrons)
Amp = Coulombs per second
Charge flow = Current X Time
Current= Charge/Time
MODELS OF electricity
Water
Rope
Sweets
Electricity and Circuits

L.O
Current
Voltage
Define potential difference.
State the name of the particle that carries the electrical charge round a circuit.
Ask questions such as:
• What is an electric current?
• Which particle moves to cause an electric current?
• What makes the particle move?
Define an electric current.
Describe and explain why an electric current will flow in a circuit.
Describe different models of electricity including:
• marbles moving down a ramp with masses placed on the ramp to represent atoms
• rope models of electricity with knots or marks on the rope to represent electrons
• students modelling the electrons taking energy (sweets) from the battery (teacher) to a component (cup held by a pupil).
Evaluate the benefits and drawbacks of each model.
Calculate the charge flow, current or time when given the other two values. State the units used for each quantity.

what is current?
Investigating Voltage
Build the following circuits
How does voltage change?
how does current Change?
Drawing and testing circuits
draw the circuit into your book
identify the roblem with the circuit
KEY MISTAKES
Full transcript