electromagnet

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

What is an electromagnet?

• a temporary magnet made from current carrying wire around a magnetic metal core.
• a permanent magnet with a north and south pole

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

While electric current is flowing through a wire, what surrounds the wire?

• a magnetic field
• a glowing light
• neutrons
• protons

What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.
• Inserting a wooden core inside the coil
• Changing the direction of the current
• Decreasing the number of coils of wire

Why do you think the compass needle is moving when is near to electromagnet?

• Because of the magnetic field generated in the wire.

• Because of the electricity generated in the compass.

What are the components of the electromagnet?

• copper wire, iron nail, and a wooden stick

• copper wire, iron nail

• copper wire, iron nail, and a battery

• Copper wire, paper and a battery

What component becomes a temporary magnet when electricity is flowing through the circuit?

• iron nail

• copper wire

• battery

• switch

What component provides the pathway to carry electricity from component to component?

• battery

• wire

• switch

• iron nail

Which component provides the energy or the power source to run the electromagnet?

• Iron nail

• wire

• Switch

• Battery