Keywords Electricity And Magnetism Flashcards
Magnetism
the effect of magnet poles on magnetic material
Magnet
a material or object that produces a magnetic field
Peer review
making scientific research available to others to repeat and debate
Non-contact force
a force that arises even though objects are not touching – this is due to the interaction of fields.
attract
to pull towards another object
pole
the end of a magnet which is called the north pole or the south pole
repel
to push away from another object
permanent magnet
a magnet that keeps its magnetism for a long time
temporary magnet
an object that is attracted by a magnet and shows magnetic properties when in a magnetic field
electromagnet
a type of temporary magnet that is magnetic only when an electric current passes through it
domain
groups of atoms bound together that are aligned in the same magnetic direction
magnetic field
the space in which a magnetic material feels a magnetic force
strength
the ability of a solid to withstand a force
field lines
to show the shape and size of a (magnetic) field
core
the piece of iron inside the coil of an electromagnet which makes the magnetic field stronger
subjective
when different people may interpret the results of an investigation differently
reliability
a measure of how good data is
repeatability
when repeat tests of an investigation made by the same experimenter give similar results
reproduceibility
when an investigation method is repeated exactly and the same results are obtained by a different experimenter
accuracy
how close data is to the true value
precision
how close measured values are for repeated results
geodynamic theory
magnetic domains within a (core) liquid line up to create a weak magnetic field
magnetosphere
magnetic field around the Earth
solar wind
a stream of charged particles released from the upper atmosphere of the Sun
electric current
a flow of positive charge – these are usually caused by the movement of electrons, which have a negative charge) moving in the opposite direction
armature
the iron bar inside an electric bell
contact
the point at which a circuit is made e.g. a switch
circuit breaker
a device that breaks a circuit when too high a current is drawn from the mains
electric motor
this transfers energy by electricity and uses magnetic force to cause movement and do useful work
motor effect
a wire carrying a current moves when placed in an electric field
direct current(D.C.)
current that always flows in one direction
