number of wire coils on magnetic force? Magnet #1 Magnetic force strength: ))) Magnet #2 Magnetic force strength: Using Magnet #. will result in more system potential energy because the magnetic force it produces is Evidence Card G: What is the effect of distance between the car and launcher on the potential energy in the system? Magnets close together Initial potential energy: Number of grid points between magnets: Magnets a medium distance apart Initial potential energy: Number of grid points between magnets: Magnets far apart Initial potential energy: Number of grid points between magnets:

What is the primary difference between an electric motor and an electric generator? 1. Structurally they are similar but the elec- tric motor is more efficient than the electric generator. 2. Structurally they are similar but the elec- tric generator is more efficient than the elec- tric motor. 3. An electric motor is often much more complicated in structure than electric genera- tor. 4. An electric motor is used to produce elec- tricity while an electric generator is used to generate mechanic work with the input of electricity.

5-8. Draw the direction of magnetic field at each point in the Helmholtz Coils below. 0-0 A D 9. In above figure, the current through each coil is 3.0 A. Each side has 200 turns of 0.20 m diameter coils. What is the magnetic field at midpoint between coils along the axis?

#12 The moving charge in the wire causes the compass to deflect; this is because  a the moving charge induces a magnet field  b the energy of the charge pushes on the compass  c the electrons heat up the wire, causing the compass to deflect