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by Procheta Mallik

Introduction

Observe a pen appear to float in air because of forces from different directions balancing it.

Mount two magnets on a pen about 2 cm from each end. On a foam piece create slots and insert four magnets in a specific orientation. Insert an ice cream stick piece at one end and levitate the pen. The polarity of the magnets are critical to this TACtivity.

Video Overview

    • Scissors and Cutters have sharp functional edges. If they come in contact with the body, they may lead to cuts.

  1. On the given foam piece of 8 cm x 10 cm, at a distance of 1 cm from one end, make a slit using a cutter and insert an ice cream stick piece at the centre of the slit. At a distance of about 2 cm from the ice cream stick piece, make a slit parallel to the first slit and insert 2 ring magnets in the slit. At a further distance of about 5 cm from the magnets, make another parallel slit to insert two more ring magnets in it.
    • On the given foam piece of 8 cm x 10 cm, at a distance of 1 cm from one end, make a slit using a cutter and insert an ice cream stick piece at the centre of the slit.

    • At a distance of about 2 cm from the ice cream stick piece, make a slit parallel to the first slit and insert 2 ring magnets in the slit.

    • At a further distance of about 5 cm from the magnets, make another parallel slit to insert two more ring magnets in it.

  2. The front two magnets should have a distance of about half a cm between them . The back magnets should be around 1 cm apart.
    • The front two magnets should have a distance of about half a cm between them .

    • The back magnets should be around 1 cm apart.

    • Make sure that the spaces between the respective magnets and the ice cream stick are aligned in a straight line.

  3. Take a pen and insert a ring magnet at a distance of 7 cm from the tip . Another ring magnet at a distance of 2.6 cm from the tip . If required, add small pieces of paper to fill the gap between the pen and the magnets so that they are tightly placed on the pen.
    • Take a pen and insert a ring magnet at a distance of 7 cm from the tip .

    • Another ring magnet at a distance of 2.6 cm from the tip .

    • If required, add small pieces of paper to fill the gap between the pen and the magnets so that they are tightly placed on the pen.

  4. Place the pen in such a way that the tip of the pen touches the ice cream stick The orientation of the magnets and their positioning is absolutely crucial Make  sure that the front magnet on the pen is attracted to both the front magnets on the base and is also placed slightly behind the pair of magnets on the base.
    • Place the pen in such a way that the tip of the pen touches the ice cream stick

    • The orientation of the magnets and their positioning is absolutely crucial

    • Make sure that the front magnet on the pen is attracted to both the front magnets on the base and is also placed slightly behind the pair of magnets on the base.

    • The rear magnet on the pen should repel the two rear magnets on the base and must be directly above the rear magnets on the base.

    • The idea is that you may adjust and play around with the position and orientation of the magnets on the foam and pen such that you achieve the desired result of almost perfect horizontal levitation. Hence do not glue anything up front.

    • Spin the pen with your fingers and observe.

    • You may also try blowing towards the pen and observe what happens .

    • A glimpse of Magnetic Levitation .

  5. Reverse the polarity of front two magnets on the base as shown.Record what happens when you place the pen . Reset the polarity of front two magnets to original and reverse the polarity of the back magnets as shown. Record your observations. Push the ice cream stick forward. Record what happens when you place the pen.
    • Reverse the polarity of front two magnets on the base as shown.Record what happens when you place the pen .

    • Reset the polarity of front two magnets to original and reverse the polarity of the back magnets as shown. Record your observations.

    • Push the ice cream stick forward. Record what happens when you place the pen.

    • Fill your observations in given observation table.

  6. Spin the pen gently and record the time it spins before stopping. Depending on how stable the model is, your pen may fall after sometime. In that case, record the time before it derails. Repeat this 5 times to average out any measurement errors.
    • Spin the pen gently and record the time it spins before stopping. Depending on how stable the model is, your pen may fall after sometime. In that case, record the time before it derails.

    • Repeat this 5 times to average out any measurement errors.

    • Replace the ice cream stick by a piece of old CD and repeat the measurement for five trials.

    • Use the given observation table to record your findings.

  7. Variation 1-Changing the distance between the set of magnets  on the foam. Variation 2-Changing the point of contact. Variation 3-Changing the medium of rotation .
    • Variation 1-Changing the distance between the set of magnets on the foam.

    • Variation 2-Changing the point of contact.

    • Variation 3-Changing the medium of rotation .

    • Improper positioning of magnets .

    • Diameter of ring magnets is either too small or too big compared to that of pen .

    • Improper position of the ice cream stick.

    • The magnets not being firmly placed on the pen.

    • The slits being too broad.

Finish Line

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Vishal Bhatt

Member since: 04/26/2017

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