# Investigating Electromagnets

Topics: Magnetic field, Electromagnetism, Electromagnet Pages: 3 (712 words) Published: April 4, 2009
Investigating Electromagnets

Aim: The aim of the experiment is to investigate what affects the strength of an electromagnet.

Hypothesis: The more coils and electricity the more powerful the electromagnet becomes.

Prediction: When the voltage of electricity is increased I think that the nail will have more magnetism allowing it to attract more paper clips, because with more voltage going through the circuit, it can then make the electromagnet stronger.

Variables:
Independent The independent variable which we can control is the amount of voltage we put through the electromagnet. In this case we have to change the amount of voltage to 2, 4, 6, 8, 10 and 12 volts.

Dependant The dependant variable is the amount of paper clips that will cling to the electromagnet.

Controlled The controlled variable is making sure that it is a fair test by having the same amount of coils, the same nail, the same paper clips and the same person holding the equipment in place.

Equipment:
1 nail or long iron object
2 connecting wires with alligator clips
1 power pack or switch
Paper clips

Method:
1.Collect equipment
2.Set equipment up as shown on diagram
3.Set power pack to voltage 2
4.Then select someone to hold the nail 10cm above bench
5.Turn on power pack
6.Then move the iron object towards the paperclips
7.Then count the amount of paperclips that stuck to the iron object and record results in a table. 8.Know repeat the method again raising the voltage to 4, 6, 8, 10 and 12

Results: On volts four and six it only picked up one paper clip at a time and on volt two it picked up two paper clips. When the volts got to eight, ten and twelve the electromagnet started to pick-up 8, 9 and 10 paper clips.

VoltsNo. of Paper Clips
2 2
4 3
6 4
8 8
10 9
12 10

When the switch was turned on there were...

Bibliography: http://www.howstuffworks.com/electromagnet.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html