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2. (4 pts) Give some of the differences in the patterns you observe in C-I and C-II in the lab manual. The attached pdf file will be very useful to answer this question. Explain differences in terms of the magnetic field lines and the magnitude of the magnetic fields. 3. (6 pts) (a). You have a sensitive scientific experiment that must be protected from any external magnetic field. How would you accomplish the protection? Also in your answer include the type of material that would be involved in the protection. (b). In Part D. when the magnet is attached to the metal ring how would you suggest that the magnetic field pattern looks in order that it does not affect the iron filings? Make a sketch to demonstrate your answer. When you are filled copying the palm by whatever means you choose), wery carefully slide the transparent sheet horizontally of the platform and the magnet (Two persons may be required to do the one to hold the magnets while the other person slides the transparent sheet) Then, carefully and without spilling it, rear the iron filling to its orage container. Using a damp paper towel wipe the transparent plate. If any iron filings come in contact with your hand or fingers you should wash your hands to remove c. Using iren filings to demonstrate the magnetic field around a pair of magnets You will use iron filings to demonstrate the magnetic field lines around arrangement of magnetic poles from a pair of red shaped magna C-I. The magnets have the same orientation You will examine the magnetic field pattern around a pair of rod magnets where the like poles are arranged adjacent to each other Place the two rod magnets in the rectangular cutout of the cardboard platform, with like poles adjacent. See Fig. In this orientation the magnets will repel each other. To keep the magnets together it is suggested that the black plastic spacer that was in the box with the magnets be placed between the two magiets and tape is used to secure the magnets with the spacer so that the magnets remain in the desired orientation with the spacer between them. Place the transparent sheet to cover the magnets and the cardboard platform Very carefully and gently sprinkle the iron filings to form a fairly thin coating on the transparent platform above the magnets. Make a careful, and as accurate as you can, sketch of the pattern that you see formed on the glass platform, or make a photograph, as mentioned above in the previous procedure. You should see a correspondence between the pattern of the iron filings and the sketch in the previous procedure (8) Hower, there should be significant difference between the representations, especially at the four poles. Be sure to note these differences in your Ohservations. An example of a previous student's result of this part of the lab is shown in Fig. 4. (Note that one of the strips of tape holding the magnets together, clearly seen in Fig. 41 10 . oo- You will set of peodymium ( N ages and the device shown in Fig. 6 which consists of a plastic fube partially surrounded by of iron ring The plastie tabe continence filings which can frem ove inside the tube. The ends of the tube are securely stoppered and taped so that the iron filings are completely contained inside the tube. This device will be med to demonstrate that it is possible to shield devions from magnetic field. There is a Velero tepe Overed plastic buildup shown in the figure. This buildup region is simply to raise that part of the plastie tube to approximately the same thickness at that of the metal ring. There is no metallic material in the buildup. Fig. 6 Velcro Tape ring covering plastic buildup Plastic tube Iron filings inside Soft iron metal ring plastic tube If the taped stack (approximately 1" long) of very strong Nd magnets is attached to the soft iron ring you should now slide it off the metal ring and locate it far enough the tube so that it does not affect the results of step 1 Step 1. Tilt the tube about 45 degrees above and below the horizontal and note that the iron filings flow casily from one end of it to the other. Return the tube so it is approximately horizontal Step 2. Place the taped magnet stack so that one end of it rests on the Velcro strip and the magnetis perpendicular to the tube. Now repeat tilting the tube with the magnet in place and note that the iron filings tend to be attracted to the region inside the tube directly opposite the end of the magnet Step 3. Now, remove the magnet from the Velcro strip and allach one end of it to the metal ring so that it is onenied similar to the way it was when it had been placed on the Velcro strip. The same end that was in contact with Velcro strip should be the end in contact with the metal ring.) The magnet should be attached to the metal ring so that the magnet is about in the same orientation as it was on the Velcro tapering Now till the tube approximately 45 degrees above and below the horizontal Record what happens to the iron g new Your observation show that the iron filings flow as it did in step is there is no man The metal ring ha effectively shielded the iron filings from the external magnetic theid L ou will now demonstrate that an electric current sets up a magnetic field and (2) that current carrying nemen enperiences a force when placed in an external magnetic field. You will a ver that the rechtban rule' predicts the direction of the force on the wire El. Verify that an electric current sets up a magnetic field. 2. (4 pts) Give some of the differences in the patterns you observe in C-I and C-II in the lab manual. The attached pdf file will be very useful to answer this question. Explain differences in terms of the magnetic field lines and the magnitude of the magnetic fields. 3. (6 pts) (a). You have a sensitive scientific experiment that must be protected from any external magnetic field. How would you accomplish the protection? Also in your answer include the type of material that would be involved in the protection. (b). In Part D. when the magnet is attached to the metal ring how would you suggest that the magnetic field pattern looks in order that it does not affect the iron filings? Make a sketch to demonstrate your answer. When you are filled copying the palm by whatever means you choose), wery carefully slide the transparent sheet horizontally of the platform and the magnet (Two persons may be required to do the one to hold the magnets while the other person slides the transparent sheet) Then, carefully and without spilling it, rear the iron filling to its orage container. Using a damp paper towel wipe the transparent plate. If any iron filings come in contact with your hand or fingers you should wash your hands to remove c. Using iren filings to demonstrate the magnetic field around a pair of magnets You will use iron filings to demonstrate the magnetic field lines around arrangement of magnetic poles from a pair of red shaped magna C-I. The magnets have the same orientation You will examine the magnetic field pattern around a pair of rod magnets where the like poles are arranged adjacent to each other Place the two rod magnets in the rectangular cutout of the cardboard platform, with like poles adjacent. See Fig. In this orientation the magnets will repel each other. To keep the magnets together it is suggested that the black plastic spacer that was in the box with the magnets be placed between the two magiets and tape is used to secure the magnets with the spacer so that the magnets remain in the desired orientation with the spacer between them. Place the transparent sheet to cover the magnets and the cardboard platform Very carefully and gently sprinkle the iron filings to form a fairly thin coating on the transparent platform above the magnets. Make a careful, and as accurate as you can, sketch of the pattern that you see formed on the glass platform, or make a photograph, as mentioned above in the previous procedure. You should see a correspondence between the pattern of the iron filings and the sketch in the previous procedure (8) Hower, there should be significant difference between the representations, especially at the four poles. Be sure to note these differences in your Ohservations. An example of a previous student's result of this part of the lab is shown in Fig. 4. (Note that one of the strips of tape holding the magnets together, clearly seen in Fig. 41 10 . oo- You will set of peodymium ( N ages and the device shown in Fig. 6 which consists of a plastic fube partially surrounded by of iron ring The plastie tabe continence filings which can frem ove inside the tube. The ends of the tube are securely stoppered and taped so that the iron filings are completely contained inside the tube. This device will be med to demonstrate that it is possible to shield devions from magnetic field. There is a Velero tepe Overed plastic buildup shown in the figure. This buildup region is simply to raise that part of the plastie tube to approximately the same thickness at that of the metal ring. There is no metallic material in the buildup. Fig. 6 Velcro Tape ring covering plastic buildup Plastic tube Iron filings inside Soft iron metal ring plastic tube If the taped stack (approximately 1" long) of very strong Nd magnets is attached to the soft iron ring you should now slide it off the metal ring and locate it far enough the tube so that it does not affect the results of step 1 Step 1. Tilt the tube about 45 degrees above and below the horizontal and note that the iron filings flow casily from one end of it to the other. Return the tube so it is approximately horizontal Step 2. Place the taped magnet stack so that one end of it rests on the Velcro strip and the magnetis perpendicular to the tube. Now repeat tilting the tube with the magnet in place and note that the iron filings tend to be attracted to the region inside the tube directly opposite the end of the magnet Step 3. Now, remove the magnet from the Velcro strip and allach one end of it to the metal ring so that it is onenied similar to the way it was when it had been placed on the Velcro strip. The same end that was in contact with Velcro strip should be the end in contact with the metal ring.) The magnet should be attached to the metal ring so that the magnet is about in the same orientation as it was on the Velcro tapering Now till the tube approximately 45 degrees above and below the horizontal Record what happens to the iron g new Your observation show that the iron filings flow as it did in step is there is no man The metal ring ha effectively shielded the iron filings from the external magnetic theid L ou will now demonstrate that an electric current sets up a magnetic field and (2) that current carrying nemen enperiences a force when placed in an external magnetic field. You will a ver that the rechtban rule' predicts the direction of the force on the wire El. Verify that an electric current sets up a magnetic field