The study of magnetic
field of magnets and current-carrying materials was conducted.
The experiment
consists of three parts. In the first part of the experiment, the magnetic
field of both the horseshoe magnet and the bar magnet was examined. The
magnetic fields at different points near and on the surface of both magnets
were measured and recorded using a magnetic sensor connected to LabQuest. A
comparison between the data was made.
Magnetic field around a horseshoe and a bar magnet |
Iron filings scattered in a sheet of paper with a horseshoe magnet underneath |
Iron filings scattered in a sheet of paper with a bar magnet underneath |
The second part of the experiment
aims to find out the magnetic field lines produced by a horseshoe magnet and a
bar magnet. Iron filings were scattered in a sheet of paper to serve as
indicators of the magnetic field lines. In one set-up, a horseshoe magnet was
placed beneath the sheet of paper. Using a camera the representation of the
magnetic field was recorded. A bar magnet was used on the other set-up.
The third part of the experiment
studies the magnetic field that runs through a charged coil of metal wire. The
effect of the position, current and the length of the wire to the magnetic
field were studied. In determining the effect of position, the coil of metal
wire was stretched in to a length of one meter. Using the magnetic sensor and
LabQuest the magnetic field of the coil was measured in 10cm intervals,
starting from -10cm up to 120cm. To determine the effect of current, the
magnetic sensor was placed 50cm from the edge of the coil. The current that
runs through the coil was increased by 0.5A from 0.5A to 2.5A. The magnetic
field at every 0.5A interval was recorded. To determine the effect of the
length of wire to the magnetic field, the wire was compressed and stretched to
a length of 25cm up to 125cm with a 25cm interval. The magnetic field at which
was taken by placing the sensor in the middle of the wire.
It was found out that
the magnetic field of both a horseshoe and bar magnet at one of its pole would
be the same around that pole and that the magnetic field is zero at the middle
of the magnet, the magnetic field lines would be the same as the electric field
lines and the theory, the magnetic field that runs through a charged coil of
metal wire is parabolic where the highest value is at the middle of the wire,
the relationship between the current and the magnetic field is directly
proportional while the relationship between the magnetic field and the length
of wire is inversely proportional