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1.2

Major VersionM

by Procheta Mallik

Introduction

Wind the given copper wire around a nail and connect the two ends of the wire to the given cell. Test the nail for magnetism with iron filings, or pins / safety pins.

Video Overview

    • Handle scissors/cutter with care

  1. Take a 60 cm piece of enamelled (insulated) copper wire and wind it on an iron nail . Remove the insulation coating at both the ends using sandpaper (or scissor/cutter blade).
    • Take a 60 cm piece of enamelled (insulated) copper wire and wind it on an iron nail .

    • Remove the insulation coating at both the ends using sandpaper (or scissor/cutter blade).

    • Wind the copper wire around the nail in a single direction.

  2. Stretch the cycle tube band and wrap it across the AA cell, as shown. Insert the two scraped-off ends of the copper wire under the tube such that they make a good connection with the respective terminals of the cell
    • Stretch the cycle tube band and wrap it across the AA cell, as shown.

    • Insert the two scraped-off ends of the copper wire under the tube such that they make a good connection with the respective terminals of the cell

  3. Place the tip of the iron nail near some iron filings (alternatively, you may use paper pins/clips or safety pins).
    • Place the tip of the iron nail near some iron filings (alternatively, you may use paper pins/clips or safety pins).

    • The iron filings should get attracted to the nail when it is connected and should fall off as soon as the connection is broken

    • Make sure the insulation on the copper wire is properly removed at the ends. You'll know this when the shiny metal under the surface is revealed

    • It is recommended not to keep the electromagnet attached to the cell for too long a time as it will heat up unnecessarily and drain the cell.

    • What will happen if the number of turns of copper wire around the iron nail is increased?

    • What happens if iron wire is used instead of copper wire?

    • What happens if we use a higher input voltage instead of the 1.5V cell used here?

    • What will happen when you change the direction/poles of the cell in the electromagnet?

    • Replace the core of the electromagnet, i.e. the iron nail, with a fatter iron nail and observe if there is any difference.

    • What will happen if you wind one half of the copper wire in one direction and the other half in the other direction? Will it affect the performance of the electromagnet? Why or why not?

Finish Line

Suhail Ahanger

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