Magnetism Quiz:

- True or false: all magnetism involves motions of electric charge. [answer at bottom]
- Magnetic Field Lines:
- Draw magnetic field lines (or show the direction of the magnetic field, B), as they relate to N and S poles of magnets.
- Show/explain how magnetic field lines look different around stronger or weaker magnets.

- Show how magnets stick together, based on their polarity.
- Explain why, when considered as a magnet, the Earth's North Pole is really a south pole.
- When an iron-containing object is brought near a permanent magnet (with poles labeled), label the temporary magnetic poles in the object.
- Know the symbol for magnetic field.
- Right Hand Rules
- Right Hand Rule with curled fingers (B and I only)
- Know how to find the directions of B and I
- Given the direction of current flowing through a solenoid, determine the direction of the solenoid's magnetic field.
- Given the direction of a solenoid's magnetic field, determine the direction of current flowing through the solenoid.

- Right Hand Rule with straight fingers (B, I, and F)
- Know how to find the directions of B, I, and F
- Given the directions of current and magnetic field on a piece of paper, determine whether the force exerted on the moving charge is into the paper or out of the paper.

- Right Hand Rule with curled fingers (B and I only)
- Lenz' Law:
- Be able to describe Lenz' Law.
- Given a magnet (with N and S labeled) that is moving near a coil...
- Describe the direction of the magnet's field.
- Determine whether the flux of that field through the coil is increasing or decreasing.
- Identify the direction of the new magnetic field that will form in response to this change in flux (from part 2).
- Identify the direction of the current that produces this new magnetic field (using the curled finger RHR).

- Know how to build a solenoid buzzer. You will be given a picture of a buzzer that is not working, and you will have to explain how to fix it. You may have to explain why it isn't working.
- Understand and be able to explain how a motor works. You will not have to determine which way a motor will move.
- Understand and be able to explain how a generator works. You will not have to determine which way the current will travel.
- Understand and be able to explain how a speaker works as a motor.
- Understand and be able to explain how a magnetic pickup works as a generator.
- Determine the voltage output from a transformer, based on the numbers of turns in the input and output coils

Answer to #1 = True