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Experiment E10 Magnetic Force on a Current-carrying Conductor |
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| In this activity, you will use an electronic balance to investigate how the magnetic force depends on the current, length of wire and magnetic flux density.
In Experiment 1, you will measure the magnetic force on the wire by finding out the change in reading of the electronic balance. The balance is set zero with the magnet placed on the pan before applying the current in the steel rule. A positive reading shows a downward force on the magnets and vice versa. You will vary the current by the rheostat to determine how the magnetic force varies with current.
In Experiment 2, you will repeat experiment 1 but you will vary the separation between the clips while keeping the current constant. By doing so, you will determine how the magnetic force varies with the length of conductor in the field.
In Experiment 3, instead of using permanent magnets, you will vary the strength of the magnetic field by using an electromagnet. You will assume that the magnetic flux density is proportional to the current that the electromagnet carries. Similar to the above experiments, you will study how the magnetic force depends on the field strength. Of course, you will keep the current through the rod and the length of the rod in the field constant. |
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