Magnetism Flashcards
Where are the forces the strongest on a magnet?
The polls
What happens when you place like poles of a magnet next to each other?
They repel
What happens when you place unlike poles next to each other
They attract
Which materials are magnetic
Iron steel cobalt and nickel
What is the direction of the magnetic field?
From north to south
What is a permanent magnet?
A material that produces its own magnetic field
What is an induced magnet?
Material that becomes magnetic when in a magnetic field
What happens to the strength of the magnetic field when the distance from the magnet is increased?
It becomes weaker
What happens when a current flows through a conducting wire?
Magnetic field is produced around the wire
What affects the strength of the magnetic field around a wire?
Size of current and distance from the wire
What does shaping a wire to form a solenoid do to the magnetic field?
Increases the strength of the magnetic fields
What is an electromagnet?
Solenoid containing an iron core
How do you change the strength of an electromagnet?
Increase in the number of coils
inserting an iron core
increasing the current
What is the motor affect?
When a conductor placed in a magnetic field experiences a force
What causes the motor affect?
Interaction between magnetic fields, (wire and permanent magnet)
