Electromagnets are objects that act like magnets when an electrical current passes through them. Unlike permanent magnets, electromagnets only work when electricity is flowing through them. Electromagnets can be made stronger by adding more coils of wire and increasing the electrical current flowing through the coils. The document provides links to videos that explain how to build an electromagnet and examples of how electromagnets are used in MRI machines and doorbells.

2. Electromagnets

3. Electromagnets
Electromagnets are objects that act
like magnets when an electrical
current passes through them. The
difference with permanent magnets
is that the magnet is activated by
electricity; if you switch off the
electrical current, the magnet stops
working. Electromagnets can be
made stronger by adding more coils
of wire and increasing the electrical
current. Link it up! How can we use
magnets to separate mixtures? Do
you remember?

4. Check out 1, homework (notebook)
Find out how to make an electromagnet.
 https://www.youtube.com/watch?time_continu
e=16&v=Wm9_DqQKmd0&feature=emb_logo
 https://www.youtube.com/watch?v=wX9QBwJBI
_Y
 Key words: conductor (a wire),
object (made of iron), Power
source (a battery),
magnetised, the circuit, is
closed, open, loses, magnetic
force

5. Challenge 1 Upload on Manage bac
Watch these videos and explain the system of
MRI or Door bell.
 MRI
 https://www.youtube.com/watch?time_continue=107&v=
kmfmGhI8l9E&feature=emb_logo
 Door bell
 https://www.youtube.com/watch?v=wA_YFAlzM2A
 https://www.youtube.com/watch?v=K7FI8O0eBBI
 Levitation (Challenging)
 https://www.youtube.com/watch?v=pCON4zfMzjU