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2.0

Major VersionM

by J Mary Leiza

Introduction

These are a set of variations for the TACtivity, Magnetism - Field Lines

Video Overview

    • Handle scissors/paper cutter with care.

    • Copper wire has sharp and pointed ends. Hence, handle it with care.

  1. Place two magnets 5 cm apart such that their broad faces and unlike poles are facing each other. Now, place the cardboard over the two magnets such that their narrow faces touch the cardboard. Sprinkle the iron filings over the cardboard  and tap it. Observe the magnetic field lines pattern between the two magnets.
    • Place two magnets 5 cm apart such that their broad faces and unlike poles are facing each other.

    • Now, place the cardboard over the two magnets such that their narrow faces touch the cardboard. Sprinkle the iron filings over the cardboard and tap it.

    • Observe the magnetic field lines pattern between the two magnets.

    • You can use the graph sheet stuck on the cardboard and iron filing sprinkler made in the main TACtivity for this variation.

  2. Place two magnets 5 cm apart such that their broad faces and like poles are facing each other. Now, place the cardboard over the two magnets such that their narrow faces touch the cardboard. Sprinkle the iron filings over the cardboard and tap it. Observe the magnetic field lines pattern between the two magnets.
    • Place two magnets 5 cm apart such that their broad faces and like poles are facing each other.

    • Now, place the cardboard over the two magnets such that their narrow faces touch the cardboard. Sprinkle the iron filings over the cardboard and tap it.

    • Observe the magnetic field lines pattern between the two magnets.

    • You can use the graph sheet stuck on the cardboard and iron filing sprinkler made in the main TACtivity for this variation.

  3. Magnetic field lines are observed in three dimensions.
    • Magnetic field lines are observed in three dimensions.

  4. Take plastic container (outer) and homeopathy container (inner). Now, place the base of the inner container at the  centre of the outer container's cap and trace its outline. Cut along the outline, using scissors, to make a hole.
    • Take plastic container (outer) and homeopathy container (inner).

    • Now, place the base of the inner container at the centre of the outer container's cap and trace its outline.

    • Cut along the outline, using scissors, to make a hole.

  5. Insert the homeopathy container into the hole made in the cap and push it, up to the mouth of the container. Apply glue on the edges and let it dry for a few minutes, to prevent any leakage during the later part of the TACtivity.
    • Insert the homeopathy container into the hole made in the cap and push it, up to the mouth of the container.

    • Apply glue on the edges and let it dry for a few minutes, to prevent any leakage during the later part of the TACtivity.

  6. Add glycerine to the container up to the marking. Now, sprinkle some iron filings into the container containing glycerine. Close the cap, with the attached homeopathy container, tightly. Shake the container well to ensure the iron filings to get distributed uniformly.
    • Add glycerine to the container up to the marking.

    • Now, sprinkle some iron filings into the container containing glycerine.

    • Close the cap, with the attached homeopathy container, tightly. Shake the container well to ensure the iron filings to get distributed uniformly.

    • You can use the iron filing sprinkler made in the main TACtivity for this variation.

  7. Add a small piece of foam into the homeopathy container. Now, place the neodymium magnet on top of the foam piece. Add the foam piece and neodymium magnet immediately after shaking the container.
    • Add a small piece of foam into the homeopathy container.

    • Now, place the neodymium magnet on top of the foam piece.

    • Add the foam piece and neodymium magnet immediately after shaking the container.

    • Observe the magnetic field lines around the neodymium magnet.

  8. Remove the Neodymium magnet and foam piece then shake the container well to ensure the iron filings to get distributed uniformly. Place the bar magnet inside the inner container. Place bar magnet immediately after shaking the container.
    • Remove the Neodymium magnet and foam piece then shake the container well to ensure the iron filings to get distributed uniformly.

    • Place the bar magnet inside the inner container.

    • Place bar magnet immediately after shaking the container.

    • Observe the field lines around bar magnet through narrow face.

    • Observe the field lines around bar magnet through broad face.

  9. Magnetic field lines are observed in an electromagnet.
    • Magnetic field lines are observed in an electromagnet.

  10. Take 100 cm of enamelled (insulated) copper wire and wind it around an iron nail in a single direction (either clockwise or anticlockwise). Ensure to leave about 6 cm of the copper wire on both the ends, i.e. before and after the winding, for connecting them  to the cell terminals. Gently, scrape both the free ends of the copper wire using the sandpaper to remove the insulation coating.
    • Take 100 cm of enamelled (insulated) copper wire and wind it around an iron nail in a single direction (either clockwise or anticlockwise).

    • Ensure to leave about 6 cm of the copper wire on both the ends, i.e. before and after the winding, for connecting them to the cell terminals.

    • Gently, scrape both the free ends of the copper wire using the sandpaper to remove the insulation coating.

    • If sandpaper is not available, then use the scissor blade or a cutter to remove the insulation.

    • Stretch the cycle tube piece and wrap it across the AA cell.

    • Insert the two scraped ends (insulation removed) of the copper wire into the cell wrapped in the cycle tube piece.

  11. Place the electromagnet on the graph sheet stuck on the cardboard. Gently sprinkle the iron filings on the electromagnet, from the sprinkler and tap it. You can use the graph sheet stuck on the cardboard and iron filing sprinkler made in the main TACtivity for this variation. Now observe the pattern of magnetic field lines in an electromagnet.
    • Place the electromagnet on the graph sheet stuck on the cardboard. Gently sprinkle the iron filings on the electromagnet, from the sprinkler and tap it.

    • You can use the graph sheet stuck on the cardboard and iron filing sprinkler made in the main TACtivity for this variation.

    • Now observe the pattern of magnetic field lines in an electromagnet.

    • Uneven sprinkling - The holes on the container should be of the same size, neither too big nor too small.

    • The field lines are clumsy - Tap the edges of the cardboard sheet gently with the help of your fingers.

    • Desired field lines not obtained - Check for the correct orientation of the magnets under the cardboard.

    • Uneven field lines in glycerine - Make sure that the iron filings are distributed uniformly in glycerine and put the magnet immediately.

    • Iron filings are not attracted to the electromagnet -

    • The insulation at the free ends of the copper wire is not neatly scraped.

    • The connection of the copper wire at the terminals of the cell is not proper.

Finish Line

Raghottam Joshi

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