Topic 10 Topic 10 ScienceScene.com 1 1. Click Show Field Meter and move the meter around. In what position outside of the magnet is the magnetic field greatest? Where is it weakest? (B represents the field strength. G is the abbreviation for the Gauss unit.) Click the tab for Electromagnet. (Remember to answer questions using complete sentences.) 12. Notice that the electrons moving through the wire loops create a magnetic field. Slide the voltage bar inside the battery to the opposite end of the battery to switch the magnetic field. A) What happens to the magnetic field if the direction of current in the wire loop is reversed? B) What happens to the strength of the magnetic field as more electrons move (as current increases)? (Use the slider bar to increase voltage.) A. B 13. Slide the voltage bar in the battery. When there is no voltage the electrons are still moving randomly though you can't see the random movement in this simulation. (Since the number of electrons moving in one direction is balanced by electrons moving the opposite direction. there is no net magnetic field.) There is no magnetic field because there is no net flow of electrons. Predict what you think will happen if a bar magnet approaches the coil of wire. Will the movement of electrons in the coil) cause the magnetic field to increase. decrease. or stay the same? Will the movement of electrons producing the opposite magnetic field be encouraged or discouraged? Explain your reasoning. (You will refer to this answer later.) Just do the best you can. Don't do web searches looking for the right answer.) Click the tab for Pickup Coil. 14. Slowly move the north end of the magnet towards the coil. What happens to the electrons in the wire as the field in the coil of wire from the north pole of the magnet increases in strength? What happens to the light bulb? 15. Slowly move the north end of the magnet away from the coil. What happens to the electrons in the wire as the field from the north pole of the magnet decreases in strength? 16. Slowly move the south end of the magnet towards the coil. What happens to the electrons in the wire as the field from the south pole of the magnet increases in strength? (Move the magnet to the other side of the coil of wire.) 17. Slowly move the south end of the magnet away from the coil. What happens to the electrons in the wire as the field from the south pole of the magnet decreases in strength