The experiment was to use the coiled wire and a magnet to produce current. The apparatus used to do this experiment were bar magnet, insulated copper wire a sensitive current measuring device and a paper towel.Procedure used.Wrapped the insulated copper wire around the cardboard tube and formed a solenoid. Then connected each end of the wire to the terminals of the current measuring device and switched it on (galvanometer) to complete the circuit.Inserted the bar magnet inside the solenoid and moved it faster and slower and switched off the galvanometer disconnect the circuitReduced the number of turns in the solenoid and repeated the procedure above to attain other results.
The results were that when the magnet was moved at a high speed inside the solenoid more current was generated than when it was moved at low speed. It also implied that the more the number of turns around the solenoid the more the current was generated.
The results were as shown below.
The Y axis current and X axis no. of turns
The slope of the graph shows the magnetic flux which is given by:
Change in current/change in number of turns.
=6-2/30-10
In this case the magnetic flux was 0.2this was because the magnet exerted a force within solenoid and it acted on the electrons and moved them round in the tube. The magnetic fields acted on all parts of the completed circuit in different ways by the direction of the magnetic fields.This magnetic field pushed current in on direction depending on the pole on the pole of the bar magnet it approached. By use of the right-hand-rule, it was possible to know the direction of the magnetic field and the current induced in the loop.This experiment is used in the motors where they use the magnetic movement to generate current and direct the current to useful significance.
