Key Terms
- Curie temperature
- well-defined temperature for ferromagnetic materials above which they cannot be magnetized
- domain
- region within a magnetic material in which the magnetic poles of individual atoms are aligned
- electric motor
- device that transforms electrical energy into mechanical energy
- electromagnet
- device that uses electric current to make a magnetic field
- electromagnetism
- study of electric and magnetic phenomena
- emf
- rate at which energy is drawn from a source per unit current flowing through a circuit
- ferromagnetic
- material such as iron, cobalt, nickel, or gadolinium that exhibits strong magnetic effects
- generator
- device that transforms mechanical energy into electrical energy
- induction
- rate at which energy is drawn from a source per unit current flowing through a circuit
- magnetic dipole
- term that describes magnets because they always have two poles: north and south
- magnetic field
- directional lines around a magnetic material that indicates the direction and magnitude of the magnetic force
- magnetic flux
- component of the magnetic field perpendicular to the surface area through which it passes and multiplied by the area
- magnetic pole
- part of a magnet that exerts the strongest force on other magnets or magnetic material
- magnetized
- material that is induced to be magnetic or that is made into a permanent magnet
- north pole
- part of a magnet that orients itself toward the geographic North Pole of Earth
- permanent magnet
- material that retains its magnetic behavior for a long time, even when exposed to demagnetizing influences
- right-hand rule
- rule involving curling the right-hand fingers from one vector to another; the direction in which the right thumb points is the direction of the resulting vector
- solenoid
- uniform cylindrical coil of wire through which electric current is passed to produce a magnetic field
- south pole
- part of a magnet that orients itself toward the geographic South Pole of Earth
- transformer
- device that transforms voltages from one value to another