This document outlines an experiment to identify factors that affect induced electric currents. The experiment involves using coils of wire and magnets to induce currents, then measuring the current with a galvanometer. It tests how induced current is affected by: the number of coil turns, the rate of magnetic field change, and magnetic field strength. The experiment aims to show that changing magnetic fields can induce currents in coils, and that the magnitude of induced current depends on these three factors.

2. Questions Part A: How can a current be induced in a coil using a magnetic field? Part B: What factors affect the magnitude of the induced current in a coil?

4. Procedure Part A 1. Connect the ends of a long piece of wire to the terminals of the galvanometer or ammeter, forming a single loop through the meter. Place the wire in the space between the poles of the horseshoe magnet and note any effect his has on the galvanometer or ammeter. 2. Remove the wire from between the poles of the magnet and again note whether there is any electric current. 3. Move the wire back and forth and then up and down between the poles of the magnet. Try to determine exactly when electric current flows and when it does not. 4. Connect the ends of the coil to the galvanometer or ammeter. Plunge a bar magnet into the core of the coil. Allow it to remain there for a few seconds and then remove it. Note the effect of each of these actions on the galvanometer. 5. Repeat the procedure using the opposite pole of the bar magnet.

5. Part B 6. Connect the two coils and the galvanometer in series, as in Figure 3. 7. Using one of the bar magnets, insert its N-pole very slowly into the core of the 600-turn coil and measure the induced current. Repeat the procedure, this time moving the magnet more quickly into the coil. Follow the same procedure for a third time, moving the magnet as quickly as possible, and once again measure the induced current. 8. Insert the N-pole of the bar magnet steadily into the core of the 300-turn coil, measuring the induced current. Repeat this procedure moving the magnet at the same speed, this time using the 600-turn coil. 9. Holding the two bar magnets tightly together so that their N-poles are together, plunge the pair into the core of the 600-turn coil and measure the induced current. Repeat the procedure using a single bar magnet, and move the magnet at the same speed as you did when using the pair of magnets. Repeat again, using two magnets held side by side with opposite poles together and moving at the same speed,

6. Analysis Part A c) Describe different ways to produce an electric current in a coil using a magnetic field. A: d) Do the charges of an induced current always flow through the conductor in the same direction? What determines their direction? e) Oersted showed that moving charges cause a magnetic field. Make a similar statement about the cause of an induced current.

7. Part B f) List the three factors that affect the magnitude of the induced current in a coil. g) What set of conditions led to the maximum value of induced current? j) When a single bar magnet is inserted into the core of a 300-turn coil at a speed of 10m/s, the induced current is measured and found to be 12mA. What does the value of the induced current become if each of the following were used? i: a magnet three times as strong ii: a 900-turn coil of the same resistance iii: a speed of 5 m/s for the magnet iv: all the changes above, at once