Hi Can you help me with a physics lab ?

To explore the relationships between electricity and magnetism, try building a simple

electromagnet. For this project, you need a large steel nail or bolt, a meter or so of insulated wire, a

fresh 1.5-volt AA battery, and some small steel objects such as paper clips. The wire's metal conductor

should be at least 0.65 mm in diameter (22 gauge or larger) to carry the current you'll send through it

without becoming too hot.

Wind the wire tightly around the nail or bolt to form a coil. You should complete at least 50

turns of wire, all in the same direction. The exact number of turns isn't important, and you can make

several layers. Be sure that the two ends of the wire are still accessible and remove the insulation from

each end so that you can connect them to the battery.

Now test your electromagnet. Connect one uninsulated end of the coil to each terminal of the

battery. You can either hold the wires on the terminals with your fingers or use tape. A 1.5-volt battery

can't give you a shock unless your skin is broken, but you should be prepared for the wire to get hot as

current flows through it. If it gets too hot to hold, let go and make sure that the wire detaches from the

battery so that it doesn't start a fire. Don't use a battery larger than AA or the wire may get dangerously

hot.

While current is flowing through the wire, the nail will act as a strong magnet, an electromagnet.

Try picking up steel objects with this electromagnet. As you touch each object with the nail, it should

stick to the nail's surface. Your electromagnet will temporarily magnetize the steel object and attract it.

1. What happens when you bring the electromagnet near a paperclip?

2. What happens when you touch this magnetized steel object to a second object?

3. What happens when you stop the flow of electric current through the coil of the electromagnet?

4. Why does the coil get hot while current is flowing through it?

5. How many paperclips can you pick up with the electromagnet. Do you think this is more or less

than you would be able to pick up with a regular magnet?

6. Uncoil some of the turns of wire and try again. Do you notice a difference? If so, what is it?