# Electromagnet

To Investigate the factors that Influence the strength of an electromagnet

Teams of 2 ....

Must be safe !

Factors that we can change

1. Thickness / Size of Iron piece / rod!
2. Length of the wire
3. Thickness of the wire
4. Change the Voltage
5. The number of time the wire is wrapped about the iron.

How do I measure the strength of the Electromagnet

1. The distance that the E/M has influence over
2. how many thumbtacks / nails / clips / paper the E/M can hold
3. The speed with which a compass moves

So how can we determine which factors count

.... make a table (or 2)

In each case describe the electromagnet that you used,

Take the number it lifted at

2V & divide by the number it lifted at 1V =

# @ 2V ÷ # @ 1V

Only change one variable per time,

this means to keep all other factors constant

Rubric

Title

Apparatus (10) 1 per item

Method (30) 2 per item + 1 per Item drawn & labelled !!!!

results(40) 10 per table 10 per graph

Conclusions(15) 1st conclusion = 10 marks

2nd conclusion = 5marks,