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What affects the strength of an electromagnet
What affects the strength of an electromagnet
What affects the strength of an electromagnet
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Recommended: What affects the strength of an electromagnet
Investigating the Strength of Electromagnets
Aim:
To investigate into the effect that changing the number of turns on
the coils has on the strength of an electromagnet.
Background Information:
If an electric current flows through a coil of wire a magnetic field
is formed around the coil, creating an electromagnet. This is a
temporary magnet, which can be switched off. There are three ways in
which you can increase the strength of an electromagnet:
Ÿ Increase the number of turns on the coil.
Ÿ Increase the size of current flowing, have more cells or increase
voltage.
Ÿ Place a soft iron core inside the coil.
There are many variables that could effect the strength of the
electromagnet:
Ÿ The current/ voltage
Ÿ The soft iron core
Ÿ The length of the piece of copper wire used for the coils.
Ÿ Number of paperclips /size.
Ÿ Time for the electromagnet to attract the paperclips.
Ÿ Leads used
In my experiment I will be increasing the amount of turns in the coil.
I will use a coil with 20, 40, 60 80 and 100 turns.
Diagram:
Equipment list:
Power pack,
Leads,
Iron core,
Copper wire,
Paper clips,
Ammeter,
Thermostat,
Stop Watch.
Investigating the strength of electromagnets(2)
Method:
I will set the apparatus as shown in the diagram above and then turn
the power pack on to Volts. Using my first coil, which has 20 turns, I
will put the electromagnet on the paperclips (100) laid on the table
and start the stop watch. I will leave the electromagnet there for 30
seconds. Next I will lift the magnet and move it away from the
paperclips that are not attracted to the magnet. Then I will switch
the electromagnet off and count and record the number of paperclips
that were still attracted to the magnet.
I shall then repeat the above only changing the number of turns on the
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