Ch.7 Magnetism And Electromagnetism Flashcards
Magnetism
The force of attraction or repulsion of magnetic materials.
Magnets
Is any material that attracts iron and material that contain iron.
Magnetic pole
The ends of a magnetic object, where the magnetic force is strongest.
Magnetic force
A force produced when magnetic poles interact.
Magnetic field
The region around a magnet where the magnetic force is exerted.
Magnetic field lines
Lines that map out the magnetic field around a magnet.
Compass
A device with a magnetized needle that can spin freely; a compass needle always points north.
Magnetic declination
The angle between geographic north and the north to which a compass needle points.
Electromagnetism
The relationship between electricity and magnetism.
Solenoid
A coil of wire with a current.
Electromagnet
A magnet created by wrapping a coil of wire with a current running through it around a core of material that is easily magnetised.
Galvanometer
A device that uses an electromagnet to detect small amounts of current.
Electric motor
A device that transforms electrical energy to mechanical energy.
Electromagnetic induction
The process of generating an electric current from the motion of a conductor through a magnetic field.
Direct current
Current consisting of charges that flow in only one direction in a circuit.
