Magnetism And Electromagnetism Flashcards
What are the poles of the magnet places where
The magnet forces are strongest
What happens when two magnets are brought together?
They exert a force-on each other
What is attraction and repulsion between two magnet poles examples of
Non- contact forc
What does a permanent magnet produce its own?
Magnetic field
What is an induced magnet?
It’s a material that becomes a magnet when placed in a magnetic field
What is induced magnetism?
Always a force of attraction
When removed from the magnetic field, what happens to an induced magnet?
It loses most or all of its magnetism quickly
What are the magnetic material?
Iron ,steel, cobalt and nickel
What is a magnetic field
the reingn around a magnet where a force acts on another magnet or a magnetic field
The force between a magnet, and a magnetic material is always what ?
One with attraction
What is the strength of a magnetic field depend on?
The distance from the magnet
Where is the field strongest at ?
The poles of the magnet
What is the direction of the magnetic field at any point given by?
The distance of the first would act on another north pole placed at that point
What does a magnetic compass contain?
A small bar magnet
What does the Earth have?
A magnetic field
What direction is the compass needle points
The direction of the earths magnetic field
What happens when a current flows through a conducting wire ?
A magnetic field is produced around the wire
What does a strength of the magnetic field around the wire depend on?
The current through the wire and the distance from the wire
What does shaping a wire to form a solenoid increase?
The strength of the magnetic field created by occur through the wire. The magnetic field inside the solenoid is strong and uniform.
Describe the magnetic field around a solenoid
It has a similar shape to that of a bar magnet
What does adding iron core increase?in a soilnoid
Strength of the magnetic field
What is a electromagnet
A soilnoid with an ion core
What is the motor effect?
When a conductor carrying a current is placed in a magnetic field, the magnet producing the field and the conductor exert a force on each other
How is magnetic flux density written as
B
