How an electromagnet can be made

What factors affect the strength of an electromagnet?

Introduction

I will be testing the factors which will make an electromagnet stronger. Electromagnets are magnets which are created and are easily controlled by electricity. All magnets have a region of space around them called the magnetic field which exerts a force on any magnetic material such as iron and steel or any other magnet which enters it. This force can be attractive and repulsive. If an electric current flows through a coil of wire a magnetic field is formed around the coil creating an electromagnet. This is a magnet which can be switched on and off.

To carry out this investigation I will follow the following steps: Insulated copper wire was coiled around a metal nail to make turns and then inserted into a power supply box. The coiled nail was put over a sheet of paper which had iron filings on, 6v was used and when the power was switched on the wire appeared to pick up the iron filings and this told us th...