ELECTROMAGNETIC LAB 2 28 17 Get ready for

ELECTROMAGNETIC LAB 2 -28 -17 Get ready for bell work!

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5. A student is building a simple electrical generator. She coils a copper wire around a bar magnet. Which action will cause the device to generate electricity? a. The student insulates the copper wire with plastic. b. The student connects the copper wire to a light bulb. c. The student moves the bar magnet through the copper wire coils.

6. In 1821 Danish physicist Hans Christian Orstead discovered that electric current flowing through a wire creates a magnetic field. This is called electricity. Which object can a student move through a coil of copper wire to produce an electric current in the wire? a. litmus paper b. battery c. magnet

7. Faraday’s law describes how a magnetic field will interact with a metallic conductor to produce an electromotive force. This phenomenon is called electromagnetic induction. Which diagram represents electromagnetic induction using a magnet and wire?

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5. A student is building a simple electrical generator. She coils a copper wire around a bar magnet. Which action will cause the device to generate electricity? a. The student insulates the copper wire with plastic. b. The student connects the copper wire to a light bulb. c. The student moves the bar magnet through the copper wire coils.

6. In 1821 Danish physicist Hans Christian Orstead discovered that electric current flowing through a wire creates a magnetic field. This is called electricity. Which object can a student move through a coil of copper wire to produce an electric current in the wire? a. litmus paper b. battery c. magnet

7. Faraday’s law describes how a magnetic field will interact with a metallic conductor to produce an electromotive force. This phenomenon is called electromagnetic induction. Which diagram represents electromagnetic induction using a magnet and wire?

Success Criteria I can distinguish the field that surrounds an electromagnet. I can distinguish the field that surrounds a magnet. TOC # 34 Electromagnetic Lab You will record your observations on a piece of paper in your science notebook.

■ Electromagnet Lab – 1) Place the batteries into the battery holders, making sure that the battery holders are connected. – 2) Wrap the wire tightly around the nail, leaving at least 4 inches of wire on each end. – 3) Attach one alligator clip to one end of the wire. Repeat with other alligator clip. – 4) Clip each of the alligator clips to the metal extensions off of the battery holders. – 5) Lift the nail, while both alligator clips are attached to the batteries, and touch it to the paper clips. – 6) Record what happened being sure to explain why and how it performed. – 7) Do not disconnect your electromagnet. You will use this for the next experiment.

■ Line Up Lab – 1) Place your nail (still wrapped, attached to the alligator clips and the batteries) in the hole—point down. – 2) Place the cardboard over the empty cup. This cup is your stand. It should hold your nail and cardboard up! – 3) Gently sprinkle the iron filings onto the cardboard right next to the nail. Watch the pattern that is made. – 4) Describe in your lab notes what you see. – 5) Draw a picture of the pattern I the iron filings. – 6) Clean up: – – – A. Pour the iron filings back into cup B. Unwind the wire from the nail C. Disconnect the wires from the alligator clips and batteries D. Take out the batteries E. Make sure all supplies are in the center of the table