Magnets Quiz

Natural magnets: rocks containing iron naturally magnetic

Temporary magnets: uses soft iron, made by stroking with a magnet OR wrapping with a wire (electromagnet)

Permanent magnet: uses hard iron, made by stroking with a magnet a lot OR holding it really close to a strong magnet (electromagnet)

by making the domains the same direction by stroking

imaginary lines that show the magnet's attractive power

when electricity flows through a wire, it creates a magnetic field around the wire

It changes the direction from pole north

Makes the needle run parallel to the wire when an electric current is passing through it

• number of coils
• length of wire
• type of wire
• number of batteries
• power in solution
• nail or bolt length
• closeness of wire
• overlapping of wire
• type of bolt

just change one at a time

• 1. when the bare side of the arms touch the paperclips, electricity flows through the coil
• 2. the coil becomes magnetized - it is repelled by the magnets below it

• 3. As the coil is repelled, it flips away from the magnets
• 4. whent he coil flips, the insulated side at the arms touch the paperclips - electricity can't flow through the coil and it stops being magnetized

• 5. The coil is no longer repelled by the magnets. It "falls over" back to its original position.
• 6. The bare sides of the arms touch the paperclips again and the cycle restarts.