E + M

Question 1

electric conductor

Answer 1

material in which electric charges easily move

Question 2

electric discharge

Answer 2

loss of an unbalanced electric charge

Question 3

electric field

Answer 3

invisible region around a charged object where an electric force is applied

Question 4

electric force

Answer 4

a force that two electrically charged objects apply to each other

Question 5

electric insulator

Answer 5

material in which electric charges cannot easily move

Question 6

electrically charged

Answer 6

having an unbalanced amount of positive charge or negative charge; positively charged objects have lost electrons and negatively charged objects have gained electrons

Question 7

electrically neutral

Answer 7

having equal amounts of positive charge and a negative charge

Question 8

nucleus

Answer 8

small, dense region consisting of protons and neutrons at the center of an atom

Question 9

charge

Answer 9

definite quanity of electricity

Question 10

electric circuit

Answer 10

closed, or complete path in which an electric current flows

Question 11

electric current

Answer 11

movement of electrically charged particles

Question 12

electric resistance

Answer 12

measure of how difficult it is for an electric current to flow in a materal

Question 13

generator

Answer 13

machine that transforms mechanical energy to electric energy

Question 14

light

Answer 14

electromagnetic radiation you can see

Question 15

voltage

Answer 15

amount of energy used to move one coulomb of electrons through the circuit

Question 16

electromagnet

Answer 16

temporary magnet made with a current-carrying wire coil wrapped around a magnetic core

Question 17

magnet

Answer 17

an object that attracts iron and other materials that have magnetic qualities similar to iron

Question 18

magnetic domain

Answer 18

region in a magnetic material in which the magnetic fields of the atoms all point in the same direction

Question 19

magnetic force

Answer 19

push or pull a magnetic field applies to either a magnetic material or an electric current

Question 20

magnetic material

Answer 20

material that is attracted to a magnet

Question 21

soft magnetic material

Answer 21

loses its magnetic field quickly (e.g. iron)

Question 22

hard magnetic material

Answer 22

keeps it’s magnetic field for long periods of time (e.g. mixtures of iron, nickel, cobalt & other elements; also naturally occurring lodestone)

Question 23

direct current

Answer 23

electric charges continually flow from the negative side of the source to the positive side

Question 24

alternating current

Answer 24

the flow of electric changes direction many times per second

Question 25

simple circuit

Answer 25

contains a source of electric energy (battery), an electric device (light bulb, buzzer), an electric conductor (wire), and often a switch

Question 26

series circuit

Answer 26

electrical path that has only one way that an electric current can flow

Question 27

parallel circuit

Answer 27

electrical path where each device connects to the electric source separately

Question 28

coulomb

Answer 28

equal to 6 quintillion electrons

Question 29

magnetic field

Answer 29

a region surrounding a magnetic material or a moving electric charge within which the force of magnetism acts

Question 30

magnetic poles

Answer 30

places on a magnet where the magnetic field lines are closest together; field lines point away from the north and toward the south ends of a magnet

Question 31

Earth’s magnetic field

Answer 31

results from flowing molten iron and nickel in the outer core

Question 32

permanent magnets

Answer 32

naturally occurring magnetite or a man-made of mixture of iron, nickel and cobalt that is irreversibly magnetized