Connect one end of the copper wire to one of the slip rings and the other end to the other slip ring (see diagram) 5. Make a hole in both the small pieces of wood to support the axel at either end. Glue the pieces to the big block base wood (see diagram). 6. Get the two thing metal pieces (brushes) and bend the tips of one end for each brush. Glue each one down to the base under a slip ring each so that they just touch (see diagram).
Connect one a wire from the bottom of a brush to the positive hole of the light bulb and another wire from the other brush to the negative hole of the light bulb (see diagram). 8. Glue down the light bulb to the base (see diagram). 9. Position the two magnets on opposite sides of the armature (3 cm away) so that a north pole faces a south pole (see diagram). 10. Now you are ready to test it. Connect wires from the 2 brushes to a galvanometer. Spin from any side with an electric hand drill. Record the current reading.
Now move the side magnets 5 cms away from their original position relative to the armature and test it. Record the current reading. Then move them 2 cms towards the armature from their original position and test it. Record the current reading. 12. Now for the other variable, turn the hand drill to a faster velocity and record the current reading. Then turn the hand drill to a slower velocity from the original velocity and record the current reading.
RESULTS Distance of Magnets from Armature (cm)