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