Electromag review
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Transcript of Electromag review
Electricity and MagnetismA Review
lodestone
Question:a piece of rock/ore that exhibits
magnetic properties
charging by induction
Question:charging that does not involve contact between the neutral body (body to be
charge) and the charge body
amber
Question:translucent yellowish-brown fossil resin that has charging properties
coulomb
Question:SI unit for charge
Benjamin Franklin
Question:proponent of One Fluid Theory on
charges
volts
Question:unit for voltage
Charles Du Fay
Question:proponent of Two Fluid Theory
ampere
Question:unit of current
ether
Question:Dielectric Theory considers charges as
a strain on this material
ohms
Question:unit of resistance
Electron Theory
Question:explains the existence of charges by
the structure of an atom
circuit
Question:an arrangement of parts that allows
an electric current to be possible
neutron
Question:a neutral sub-atomic particle
pathway
Question:where the current in a circuit passes
through
cation
Question:an atom that becomes positively
charged
closed circuit
Question:kind of circuit with a continuous path
that allows current to flow
Coulomb's Law
Question:states that like charges repel and
unlike charges attract
short circuit
Question:type of circuit where it has no load, thus posing the risk of overheating
conductor
Question:a material which has plenty of free (valence) electrons which readily
allow charges to flow
series circuit
Question:type of multiple –load circuit where all
resistors are located in one pathway
insulator
Question:a material that resists the flow of
charges
Magnesia
Question:ancient Greek city known to have
abundant lodestones
semiconductor
Question:can act either as an insulator or conductor depending on specific
orientation and/or conditions
Pliny the Elder
Question:Roman historian who wrote of a hill
made up completely of magnetic rock
superconductor
Question:a material that offers practically no
resistance to the flow of charges below some critical temperatures
electron
Question:subatomic particle primarily
responsible for magnetic phenomena
electrostatic charging
Question:process by which an object gains a net
charge
anti-ferromagnetism
Question:arrangement of magnetic atoms
where poles are aligned alternately and thus cancel each other
charging by conduction
Question:charging in which there is actual
contact between the neutral body and the charged body
polarization
Question:the realignment or separation of
charges in one body when another body, that is charged, is placed close
to it
drop it/heat it
Question:two ways to weaken magnets
voltage
Question:amount of energy per charge
North Pole /Arctic Ocean
Question:location of earth’s magnetic south
pole
current
Question:amount of charge passing through any
point in a conductor per unit time
Michael Faraday
Question:person who introduced the idea of
magnetic fields
resistance
Question:the opposition a material offers to the
flow of charges through it
Hans Oersted
Question:first observed that a current in a wire
affects a nearby compass needle
Ohm’s Law
Question:states the relationship between voltage, resistance and current
electric motor
Question:converts electrical energy to
mechanical energy
(energy/power) source
Question:provides the voltage need to create a
current in a circuit
ammeter
Question:used to measure currents
load
Question:part of a circuit where the energy of
the current is released/used up
voltmeter
Question:used to measure voltage
open circuit
Question:type of circuit where there is a break in the pathway, thus no current can
flow
induced current
Question:current produced in a wire in a
changing magnetic field
parallel circuit
Question:type of multiple –load circuit where all
resistors are located in separate pathways
magnetite
Question:the mineral found in lodestones
responsible for its magnetic properties
Chinese
Question:credited for first using magnets as a
tool in navigation
transformer
Question:used to increase/decrease the voltage
ferromagnetism
Question:arrangement of magnetic atoms
where poles are aligned and add up
domains
Question:groups of atoms join so that their magnetic fields are all going in the
same direction
South Pole /Antarctica
Question:location of earth’s magnetic north
pole
monopole
Question:type of magnet with only a north pole
or south pole, not both
force-at-a-distance / noncontact force
Question:magnetic force is what type of force?
electromagnet
Question:a magnet created using a current
galvanometer
Question:used to measure very tiny currents
ohmmeter
Question:used to measure resistance
switch
Question:a device used to easily open and close
the circuit
electromagnetic induction
Question:process of making currents using
magnets
Michael Faraday
Question:proposed the Law of Electrostatic
Induction
hydroelectric power
Question:a power source that utilizes
dams/waterfalls
generator
Question:converts mechanical energy to
electrical energy
nuclear power
Question:a power source that utilizes radioactivity/fission/fusion
solar power
Question:a power source that utilizes energy
from the sun
geothermal power
Question:a power source that utilizes the heat
under the earth’s surface
paramagnetism
Question:when magnetic atoms are not aligned
in any special way