Introduction to Electromagnets

electromagnets

Today we are learning about electromagnets.

Multiple Choice

What are the 2 poles in a magnet?

• North and South

• East and West

• Up and down

• left and right

Open Ended

What is the definition of "current"?

Open Ended

State 1 way that magnets are used.

Open Ended

What is an electromagnet?

Open Ended

state 3 things you need to create an electromagnet.

Open Ended

How are electromagnets used in speakers?

Open Ended

How are electromagnets used in electric bells?

Open Ended

State 2 ways that electromagnets are used.

Poll

What effect will increasing the number of coils have on the number of paper clips picked up?

• Increases

• Decreases

• no effect

• stop the magnet

Poll

What effect will increasing the current have on the number of paper clips picked up?

• Increases

• Decreases

• no effect

• Stop the magnet

Open Ended

What is the difference between the magnetic fields of a permanent magnet compared to an electromagnet?

Multiple Choice

The magnetic field of both a permanent and electromagnet goes from North to South.

• True

• False

Multiple Choice

How can you reverse the magnetic field of an electromagnet?

• turning the battery around

• turning the magnet around

• increasing the current

• going upside down

Multiple Choice

When the switch is off, what happens to the electromagnet?

• nothing

• keeps working

• stops working

• works harder

Open Ended

What is an advantage of an electromagnet over a permanent magnet?