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Word Count: 561
Aim To observe the generation of an electric current as a wire is cut by a magnetic field verifying Lenzs law Materials Solenoid 1 large of 500 turns 1 small of 250 turns Galvanometer Wires Rectangular Bar Magnets Procedure The Solenoid Galvanometer and wires were arranged in series to create a circuit One end of the magnet was then thrusted in to an open end of the solenoid B1 held still B2 then removed B3 and the magnitude and direction of the current produced was noted at each of these three stages The end of the magnet was then noted to be North and it was thrusted into the solenoid and the direction current was noted the polarity of the solenoid was then determined B4 The number of magnets and number of turns in the solenoid were then varied and the results were recorded accordingly C1 C2 The magnet was the held stationary inside the solenoid and the solenoid was spun around the magnet and results were recorded once again C4 Data B1 Negative current was produced therefore no reading B2 No current B3 7mA B4 Negative Current C1 250 turn solenoid500 turn solenoid 1 magnet7mA11mA 2 magnets10mA20mA C2 It appears that the number of coils in the solenoid is directly proportional to the current produced C3 One magnet - Solenoid of 750 turns SlowFast Current produced6mA15mA C4 No current Analysis From the fact that a current is only produced when the magnet inside the solenoid is moving B1 B2 B3 it is apparent that there is a relationship between the movement of the magnetic field and the current induced It also became apparent that as the magnet was inserted in to the end of the solenoid the current induced created opposing poles rejecting the movement of the magnet B4 As the number of magnets
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