A wire is shown hanging below a battery. The red portion of the wire is in a magnetic field.

1. A wire is shown hanging below a battery. The red portion of the wire is in a magnetic field. + - x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x B field into page Construct a force diagram for the red wire. Include any assumptions that you made in the process.

2. Force Diagram: Assumptions: Wire is of uniform mass Wire does not bend Wire is in equilibrium

3. A compass is placed below a thick wire as shown below. - + compass Construct a picture showing the magnetic field lines of the wire and the direction the compass will point when it is below the wire and then later when placed above the wire.

4. One possible picture, cross section of wire shown: - + compass Overhead I I Compass under wire Compass over wire

5. You are standing on the surface of the Earth. Your compass is pointing roughly due north. Construct a picture showing the magnetic field lines of the earth and label the magnetic poles of the earth.

6. Picture Magnetic South Geographic North Geographic South Magnetic North

7. You drive from Pittsburgh, PA to Philadelphia, PA [driving perfectly due east]. The mad scientist that you are causes you to charge your car positively. Philadelphia Pittsburgh Construct a free body diagram for the car. Repeat for a negatively charged car. List any assumptions you made.

8. Free Body Diagram (+) charged car: Free Body Diagram (-) charged car: Assumptions: Surface is not frictionless Charged car and B field strong enough to create a noticeable force