Ch21_Demberro

toc =Magnetism=

Prelab
I believe they will be greatly inversely related. Like most electrostatic force, the farther away things are the less influence the charges has. Also, the equation given above supports it mathematically. We will take two magnets and lay them out at different distance from each other. While doing this, we will measure the force they have on each other with a force meter. Then, we can mathematically figure out what the magnetic field is equal to.
 * 1) The objective is stated in the title. What is your hypothesis? (Attempt to answer the question, to the best of your knowledge.)
 * 1) What is the rationale for your hypothesis? (Provide detailed reasoning here. This may take the form of a list of what you already know about the topics, with a summary at the end.)
 * 1) How do you think you might test this hypothesis? (What might you measure and how?)
 * 1) Read the entire procedure through.
 * 2) Design __data table(s)__ in order to record your observations __and__ calculations. Do this in Excel a post this draft on your wiki.
 * Distance (m) || Permeability Constant (T*m/A) || Magnetic Moment (A*m^2) || Theoretical Magnetic Field Strength (T) || Experienced Magnetic Field Strength (T) || Percent Error (%) ||

Motor

 * Motor was not working.
 * 1) How does a galvanometer work?
 * 2) A galvanometer measures small electric currents. As a current passes through the metal coil, it has a magnetic field and converts the chemical energy into mechanical energy, thus detecting a current from the magnetic force.
 * 3) Define motor and generator.
 * 4) A motor converts electric energy into mechanical.
 * 5) A generator does the opposite and takes the mechanical energy and converts it to electrical.
 * 6) A motor is a device which converts electrical energy into mechanical energy (motion). Explain how your motor does so.
 * 7) The battery represents the electric energy and the coil spinning shows a mechanical energy. When the magnet is placed by the coil, the magnet's magnetic field creates a current, which leads to magnetic force, causing the coil to spin, which is a mechanical force.
 * 8) Why does the one rotor support have only ½ of its insulation sanded off?
 * 9) You need the force and current to be pointing in the same direction at all times. Since you want the coil to be flipping over, the current would change the force and the motor would not rotate.
 * 10) How could the motor you built in be converted to a generator? Describe carefully what would have to be changed and what the result would be.
 * 11) You would need to take out the battery since you need something that is not a power source and can actually be charged, so a bulb/resistor. The process would go inversely, where you would need to spin the coil to create the electrical energy.

Prelab: Magnetic Force on a Wire
The magnetic field, current, length of conductor and angle (assuming it is between 0º and 90º) should all be directly proportional to magnetic force and inversely proportional to each other. This is based on the equation for a magnetic force (F=IBLsin(ø)). Keep everything constant except for one variable and measure the force with a force meter.
 * 1) The objective is stated as a question. What is your hypothesis? (Attempt to answer the question, to the best of your knowledge.)
 * 2) Include the rationale for your hypothesis (Provide detailed reasoning here. This may take the form of a list of what you already know about the topics, with a summary at the end.)
 * 1) How do you think you might test this hypothesis? (What might you measure and how?)
 * 1) Read the entire procedure through.
 * 2) Design __data table(s)__ in order to record your observations __and__ calculations. Do this in Excel (preferable), and post a copy on your wiki.
 * Magnetic Force || Current || Length || Amount of Magnets || Sin(ø) ||
 * 1) Answer the following questions:
 * 2) How is the direction of the magnetic force oriented with respect to the directions of magnetic field and current which produced it?
 * 3) Proportional.
 * 4) How do changes in the angle between the current and the magnetic field affect the force acting between them?
 * 5) Directly proportional.
 * 6) What angle between the current and the magnetic field produces the greatest force?
 * 7) 90º
 * 8) What angle between the current and the magnetic field produces the least force?
 * 9) 0º or 180º
 * 10) How is the magnitude of the force of magnetism related to the magnitude of the length of the wire carrying the current?
 * 11) Directly
 * 12) A graph of force vs. current has a trendline with an equation of y = 0.00559x. What is the theoretical magnetic field strength of the magnet used in this experiment if the loop is 4.2-cm long? Show your work.
 * 13) F=BILsinø
 * 14) BLsinø=.00559
 * 15) B(.042)=.00559
 * 16) B=.1331T
 * 17) Find the magnetic force on the conducting loop described above, when the current is 0.352-A.
 * 18) F=BILsinø
 * 19) F=(.0059)(.352)
 * 20) F=.00197 N
 * 1) B=.1331T
 * 2) Find the magnetic force on the conducting loop described above, when the current is 0.352-A.
 * 3) F=BILsinø
 * 4) F=(.0059)(.352)
 * 5) F=.00197 N

Guiding Questions