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