Electromagnetism - Motor€¦ · — Play - Electromagnetism I! Magnetise a paper pin by rubbing a...

Electromagnetism - MotorA simple DC Motor using a battery, ferrite magnet and copper coil

Written By: Kailash NR

Electromagnetism - Motor Release: 2.1 [minor] 2019-07-03Guide ID: 274 -

This document was generated on 2019-09-22 06:25:56 PM (MST).

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INTRODUCTION[video: https://youtu.be/w-YjNRVYjcY]

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

TOOLS:Paper Cutter (1)Insulation Tape (1)

PARTS:AA Cell (1)

1.5 VInsulated copper wire (1)

Enamelled25 Gauge (about 60 cm in length)

Safety pins (2)Type 2

Ring Magnets (2)Paper pin (1)

3 cmCycle Tube Piece (1)

1 cmCotton Thread (1)

30 cm



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— Precautions

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

Exercise caution while using the paper cutter.

Do not keep the coil connected to the battery for a long time, since copper gets heated and it alsodrains the battery.

— Step 1 - Preparing the Coil I

Take 60 cm of insulated (enameled) 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!



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— Step 2 - Preparing the Coil II

Trim off the excess copper wire at the ends, so that the length of the coil and the leads are around2 cm longer than the cell.

The two leads should be of the same length.

Use a paper cutter and scrape the insulation from one entire lead. The lead is scrapped entirely.

The other lead should be scrapped on three-quarters of the circumference, but much like the firstlead, along its entire length. The lead is scraped on three sides.

Alternatively, you can use scissors or sandpaper for scraping off the insulation layer.



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— Step 3 - Preparing the Safety Pins

Place the battery inside the cut cycle tube.

"Lock" end of the pin.

"Hinge" end of the pin.

Insert the pin in between the cycle tube and battery.

Place the safety pin perpendicular to the cell so that the "lock" end of the safety pin touches theend of the cell.

Repeat the previous step on the other terminal as well.

— Step 4 - Placing the Magnets

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

If necessary, use tape to secure the magnets.

Add another magnet.



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— Play - Motor!

Insert the ends of the coil through the "hinge" ends of the safety pins so that the coil aligns directlyabove the magnets.

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



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— Play - Electromagnetism I!

Magnetise a paper pin by rubbing a ring magnet along its length in one direction, around 30-40times.

Suspend the paper pin freely with the help of a piece of thread.

Remove the magnet from the motor and bring it close to the suspended paper pin. What happens?

The coil should be conducting current. For this to happen, ensure that the scraped copper coil atboth ends is in contact with the safety pins.

— Play - Electromagnetism II!

Notice the deflection of the paper pinwhen the coil is brought near thesuspended paper pin.

What happens if we turn the batterysuch that the other side of the coilfaces the suspended pin?



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— Troubleshooting

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

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

The insulation layer might not be properly scraped off at the ends of the coil.

Use a new and powerful cell.

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

— Suggested Variations

Change the shape of the coil, say spherical. In the case of a spherical shape, create a gapbetween the turns, like a beehive, and see if the coil spins.

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

Scrape the leads of the coil entirely.

Make a double-coil motor.

Make a coil using a thinner gauge (35 gauge) enameled copper wire.

Make a smaller diameter coil.

For more information go to Electromagnetism - Motor (Variations)



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https://www.tactivity.in/Guide/Electromagnetism+-+Motor+(Variations)/481

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