1. Electric Circuits

2. Title: Current in Parallel
WALT: Set up and measure the current in a parallel circuit
I must be able to set up a parallel circuit
I should be able to state how the current changes in a parallel circuit

3. Starter – Hot seat Volunteer please!!
The volunteer can only answer yes or no.
The volunteer will be a piece of science equipment and you must guess what he or she is.
Ask our volunteer questions by raising your hand.
RULE: You must not guess the answer until at least 3 questions have been asked
Ammeter
Lamp

4. The other day we learnt.... Today, we will learn What current is ...
How to measure current.....
How in a series circuit, current .....
Today, we will learn
How current can vary within a circuit
How making changes to the number of cells or bulbs influences bulb brightness

5. A series circuit
How would we represent this in a circuit diagram? Come and draw it...

6. A parallel circuit
A parallel circuit has more than one path for the current to flow around
Demo parallel
Talk about advantages of parallel circuits – using Christmas tree example of series circuit and chandalier for parallel

7. You will test the current in 3 different places
When you draw this, just draw one diagram and label the ammeter A1, A2, A3

8. Measuring current in a parallel circuit
Look at page J3a in the workbooks
Method
Set up a circuit with 2 bulbs in parallel
Using an ammeter, measure the current in 3 different positions
Copy diagram
Record results in a table. Column 1 = Position of ammeter (Position 1, position 2, position 3); column 2 = Current (A)
Write a conclusion
Copy diagram onto board but instead of copying out all three. Use letter A with a number 1, 2 or 3 after to denote the position
Work in threes

9. Plenary
You have 2 minutes to note down a 30 second ‘presentation’ to the others about what you have learnt today.
Make notes in rough about what you are going to say.