Electromagnets Investigating Electromagnets I understand that passing an

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Electromagnets

Electromagnets

Investigating Electromagnets • I understand that passing an electrical current through a wire creates

Investigating Electromagnets • I understand that passing an electrical current through a wire creates a magnetic field. • I can use electromagnets to plan and carry out an investigation.

What are the characteristics of magnets? n n They can attract some materials They

What are the characteristics of magnets? n n They can attract some materials They can also repel other magnets They are usually made of iron They have two ends called magnetic poles Magnet Video

How to make an electromagnet. . . • Wrap the wire around the iron

How to make an electromagnet. . . • Wrap the wire around the iron nail. • Connect a crocodile clip to each end of the wire • Plug the other end of the wires into the Power pack. • Turn the Power Pack on.

Your Investigation. . . Mr T. Has given up his career in acting and

Your Investigation. . . Mr T. Has given up his career in acting and has decided to buy a scrap-yard in Eastbourne! He’s only been there a month and already the giant magnet he uses for moving scrap cars around has broken. Mr T. wants you to carry out an investigation into electromagnets to help him decide whether it’s worth buying one. These are the questions I want answered fool; • Do more coils in the wire make an electromagnet stronger? • How many cars (paper clips) can your electromagnet attract with 10 coils. • What happens if you add more?

We are investigating how increasing the number of coils in an electromagnet affects the

We are investigating how increasing the number of coils in an electromagnet affects the strength of the electromagnet. Variables – What could we change? FAIR TEST!

Results Table Draw a table like this one in your books ready to carry

Results Table Draw a table like this one in your books ready to carry out your investigation; Number of Coils Number of Paperclips I pity the fool who doesn’t record their results!

Class Results No. Coils 10 12 14 16 18 20 22 Group 1 Group

Class Results No. Coils 10 12 14 16 18 20 22 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Average

Showing your Results. . . Draw a line graph showing how the number of

Showing your Results. . . Draw a line graph showing how the number of coils affects the strength of the electromagnet. Graph Title • Write a title for your graph Paperclips Lifted • The x axis (horizontal) should show the number of coils on the electromagnet Number of Coils • The y axis (vertical) should show the number of paper clips it picked up.

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