magnetism Flashcards
like charges
repel
opposite charges
attract
a magnet is strongest at its
poles
the area of force around a magnet is
magnetic field
what is a compass
a device a tiny magnet that aligns with Earth’s north & south poles
what is a compass used for
it is used to determine direction
why does earth have a magnetic field
because of its iron core
Law of conservation of electrical charges states
charges can’t be created or destroyed only transferred
what happens when an atom loses an electron
it becomes positively charged
what happens when an atom gains an electron
it becomes negatively charged
what is static electricity
sudden discharge of electrons
examples of electric conductors
copper, silver, gold, aluminum
examples of electric insulators
plastic, rubber, paper, glass, ceramic, teflon
a coil of wire with a electric current
solenoid
