The Three Electric CompassAndrés Jaramillo Erazo

Gabriel PatiñoJuan Londoño

RESULTS ANDCONCLUTIONS

QUESTION HYPOTHESIS MATERIALS PROCEDURE

VIDEOPICTUERES CIRCUIT DIAGRAM

QUESTION

I know magnets affect a compass, but can electric current affect a compass?

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HYPOTHESISWe don’t think electric current affects a compass, because a magnet has iron and electricity doesn’t have iron.

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MATERIALSAluminum foilSize D batterySmall cereal bowlSewing needleBar magnetWaterSmall piece of corrugated cardboardCompassCamera to take pictures and video

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PROCEDURE1.Gather all of the materials. Cut the aluminum foil into a 36 inch strip. Wrap the aluminum strip around the bowl as many times as possible – the first layer going over the top of the bowl. (leave 15 cm free on both ends of the strip). 2.Magnetize the needle by laying it on the magnet for 2 minutes.3.Fill the bowl ¾ full of water.

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4.Have your teacher help put the magnetized needle through the cardboard piece until it pokes out of the opposite end of the cardboard. Leave equal lengths of the needle extending from each side of the cardboard.5. Float the cardboard square gently on the water and let it com to rest.6. Use the compass to determine what direction the ends of the floating needle are pointing.7. Turn the bowl so the aluminum strips are running in the same direction as the needle, north to south.8.Stand the flat (negative part) of the battery on one end of the foil.9.Watch the needle as you touch the other end of the foil to the positive part of the battery.10. Remove the foil and repeat step 9 a few times.

PICTURES

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VIDEO

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RESULTS AND CONCLUSIONS

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Explain what happened and why…

We found that current electricity can affect a compass because the needle is magnetized and acts like a compass. The battery makes the electrons move through the foil so the needle is in a magnetic field.

CIRCUIT DIAGRAM

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