Download Electromagnets - Noadswood Science

Electromagnets Experiment
How can you make a strong electromagnet?
There are three things that you could change to alter the strength of the
electromagnet: o The number of turns of wire
o The current flowing
o The core
Prediction
I think that if I have _________ (more/fewer) turns of wire the electromagnet
will be _________ (stronger/weaker).
I think that if there is _________ (more/less) current flowing the electromagnet
will be _________ (stronger/weaker).
I think the electromagnet will be stronger if the core is made from _________.
This is because _____________________________________________.
Method
Here is a diagram of the apparatus you will use - label the diagram using words from
the apparatus list
Apparatus: •Insulated wire
•Connecting wires
•Power pack
•2 crocodile clips
•Paper clips
•Iron rod or nail
•Glass rod
•Pencil
Test 1 - number of turns of wire
I will change the number of turns of wire.
To make this a fair test I must keep the _________ and the _________ the same.
Record your results in the table below.
How many times will you do each test to make it reliable? ……………..
Results
Number of turns
Number of paper clips picked up
Challenge: Draw a graph of you results
Plot the number of turns along the x axes, and the number of paper clips on the y
axes.
Considering your results/conclusion
When there were more turns of wire, the electromagnet picked up _________
(more/less) paper clips. An electromagnet is _________ (stronger/weaker) with a
lot of turns of wire.
Test 2 – current
You can change the current by changing the voltage. A higher voltage will give you a
higher current.
SAFETY: You can only go up to 6V max.
To make this a fair test I must keep the _________ and the _________the same.
How many times will you do each test to make is more reliable?..........................
Results
Voltage (V)
Number of paper clips picked up
Considering your results/conclusion
The electromagnet is strongest when the voltage and current are _________
(highest/lowest)
Challenge: draw a graph of results.
Voltage on the x axes and number of paper clips on the y
axes
Number of paper
clips
Voltage (V)