Physics 12Lab-5S Mapping a Magnetic Field
Objective:To establish magnetic field (B) lines around permanent or induced magnet(s)
Materials: bar magnets, conductor loops made of high resistance wire, several compass
Procedure: 1. Form a hypothesis regarding each the following magnetic fields.
I. Bar Magnet1. Determine the north and south poles of your magnets using a magnetic compass. Place a bar magnet centered on your blank paper and outline its shape. Label the N/S poles.
2.Placing several button compass near the N pole, do the field lines ever cross one another?
3.Locate one closed loop field line at a time by placing several button compass near one side of the bar magnet. Mark the field line on your paper.
4.Repeat for a total of 8 lines, 4 on each side of magnet's axis.
5.Complete the closed loop field lines by running the field line through the magnet from south to north.Show arrows correctly inside and outside the magnet.
II. 2 Bar Magnets1. Align N & S poles of2 bar magnets about 15 cm apart. Repeat the mapping method described above between the two poles.Show arrows correctly.
2. Align N/N or S/S. Repeat the mapping method.Show arrows correctly.
III. Induced magnetic field from a current-carrying loop: Find the N/S poles and 8 field lines on each side of a current-carrying loop. Label the N/S poles and the field lines with appropriate arrows.
Analysis
1. Where are the magnetic field lines closest? What does this imply?
2. Discuss the lab evidence obtained on your data sheets for attraction and repulsion of magnetic poles. (Hint: look at the field lines and your arrows).
3. In your summary, discuss the magnetic field and its similarities and differences with electrical fields and gravitational fields. In all three cases, do field lines ever cross?
Physics 12Lab-5S Mapping a Magnetic Field
Objective:To establish magnetic field (B) lines around permanent or induced magnet(s)
Materials: bar magnets, conductor loops made of high resistance wire, several compass
Procedure: 1. Form a hypothesis regarding each the following magnetic fields.
I. Bar Magnet1. Determine the north and south poles of your magnets using a magnetic compass. Place a bar magnet centered on your blank paper and outline its shape. Label the N/S poles.
2.Placing several button compass near the N pole, do the field lines ever cross one another?
3.Locate one closed loop field line at a time by placing several button compass near one side of the bar magnet. Mark the field line on your paper.
4.Repeat for a total of 8 lines, 4 on each side of magnet's axis.
5.Complete the closed loop field lines by running the field line through the magnet from south to north.Show arrows correctly inside and outside the magnet.
II. 2 Bar Magnets1. Align N & S poles of2 bar magnets about 15 cm apart. Repeat the mapping method described above between the two poles.Show arrows correctly.
2. Align N/N or S/S. Repeat the mapping method.Show arrows correctly.
III. Induced magnetic field from a current-carrying loop: Find the N/S poles and 8 field lines on each side of a current-carrying loop. Label the N/S poles and the field lines with appropriate arrows.
Analysis
1. Where are the magnetic field lines closest? What does this imply?
2. Discuss the lab evidence obtained on your data sheets for attraction and repulsion of magnetic poles. (Hint: look at the field lines and your arrows).
3. In your summary, discuss the magnetic field and its similarities and differences with electrical fields and gravitational fields. In all three cases, do field lines ever cross?