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1.7

Minor Versionm

by Procheta Mallik

Introduction

A copper coil connected to a battery acts as an electromagnet, which then interacts with a permanent magnet to simulate the functioning of a simple DC Motor

Video Overview

    • Be wary of the sharp/pointy end of the safety pins and the copper wire.

    • Exercise caution when using the paper cutter.

  1. Take 60 cm of insulated (enamelled) copper wire and wind it around the battery. Carefully remove the coil from the battery. Tie knots on both ends to secure the coil.
    • Take 60 cm of insulated (enamelled) copper wire and wind it around the battery.

    • Carefully remove the coil from the battery.

    • Tie knots on both ends to secure the coil.

    • Make sure the loose ends are exactly diametrically opposite, i.e. 9 o'clock and 3 o'clock!

  2. Trim off  the excess copper wire at the ends, so that  the length of the coil and the leads is around 2 cm longer than the cell. The two leads should be of the same length. Consider that the each lead has a length and a circumference.
    • Trim off the excess copper wire at the ends, so that the length of the coil and the leads is around 2 cm longer than the cell.

    • The two leads should be of the same length.

    • Consider that the each lead has a length and a circumference.

    • Use a paper cutter to fully scrape the insulation from one entire lead.

    • The other lead should be scraped on three-quarters of the circumference, but much like the first lead, along its entire length.

    • The lead is scraped entirely.

    • The lead is scraped on three sides.

    • Alternatively, you can use scissors or sand paper for scraping off the insulation layer.

  3. "Lock" end "Hinge" end Place the safety pin perpendicular to the  cell so that the "lock" end of the safety pin touches the terminal of the cell and secure it with a tape.
    • "Lock" end

    • "Hinge" end

    • Place the safety pin perpendicular to the cell so that the "lock" end of the safety pin touches the terminal of the cell and secure it with a tape.

    • Repeat the previous step on the other terminal as well.

    • Note that instead of tape you may also use bands cut out from a bicycle tube to secure the safety pins

  4. Place two ring magnets on the surface of the battery, in between the two safety pins.
    • Place two ring magnets on the surface of the battery, in between the two safety pins.

    • If necessary, use tape to secure the magnets.

  5. Insert the ends of the coil through the "hinge" ends of the safety pins so that the coil aligns directly above the magnets. The coil should spin  once you give it a small impetus.(push)
    • Insert the ends of the coil through the "hinge" ends of the safety pins so that the coil aligns directly above the magnets.

    • The coil should spin once you give it a small impetus.(push)

    • Number of turns in the coil might be less, use a longer wire to get more number of turns.

    • Safety pins might not be in contact with the cell terminals.

    • Insulation layer might not be properly scraped off at the ends of the coil.

    • Use a fresh and potent cell.

    • The ends of coil might not be long enough to stay and spin within the safety pins.

  6. How many windings are done on the cell? Fill the observation table. Fill the observation table.
    • How many windings are done on the cell?

    • Fill the observation table.

  7. Change the shape of the coil, say squarish or spherical. In case of a spherical shape, create a gap between the turns, like a beehive, and see if the coil spins. Make the coil using different material, like binding wire. Make a double-coil motor.
    • Change the shape of the coil, say squarish or spherical. In case of a spherical shape, create a gap between the turns, like a beehive, and see if the coil spins.

    • Make the coil using different material, like binding wire.

    • Make a double-coil motor.

    • Make a coil with different number of turns.

    • Make a coil using thinner gauge (35 gauge) enamelled copper wire

    • Make a smaller diameter coil

    • Scrape the leads of the coil entirely

    • For more information go to Electromagnetism - Motor (Variations)

Finish Line

Attached Documents

Kailash NR

Member since: 05/02/2017

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