unit 3 review

Question 1

electric charge that stays in one place

Answer 1

static electricity

Question 2

change in potential energy per one coulomb of charge

Answer 2

voltage

Question 3

continuous flow of charge in a circuit

Answer 3

current

Question 4

ratio of voltage to the current

Answer 4

resistance

Question 5

what does the current in each part of a parallel circuit depend on?

Answer 5

it depends on the resistance of each path

Question 6

amount of current in a series circuit

Answer 6

(series) the current is the same throughout the whole circuit and is equal to the current supplied by the battery

Question 7

amount of voltage in a series circuit

Answer 7

(series) the voltage across each of the loads in a circuit add up to the voltage supplied by the battery

Question 8

what happens if you add a resistor in a series circuit?

Answer 8

(series) resistors placed in a series circuit INCREASES the total resistance in a circuit; current DECREASES

Question 9

amount of current in a parallel circuit

Answer 9

(parallel) the current through each pathway add up to the total current supplied by the battery

Question 10

amount of voltage in a parallel circuit

Answer 10

(parallel) the voltage across each load are EQUAL TO EACH OTHER and to the voltage to supplied by the battery

Question 11

what happens if you add a resistor to a parallel circuit?

Answer 11

(parallel) resistors in a parallel circuit DECREASE the total resistance; current INCREASES

Question 12

what is the unit of measurement for electrical potential difference?

Answer 12

volt

Question 13

what is the unit of measurement for current?

Answer 13

amperes

Question 14

what is the unit of measurement for resistance?

Answer 14

ohm

Question 15

what is the unit of measurement for electrical charge?

Answer 15

coulomb

Question 16

what is a unit of measurement for power?

Answer 16

watt

Question 17

define power

Answer 17

the rate of energy conversion

Question 18

(circuit) a device that controls electric current by turning on and off

Answer 18

switch

Question 19

(circuit) a device that converts electrical energy to other forms of energy

Answer 19

load

Question 20

a complete pathway that allows electrons to flow

Answer 20

circuit

Question 21

(circuit) what is a source?

Answer 21

a source of energy

Question 22

(circuit) what is a conductor?

Answer 22

it is a wire where current flows

Question 23

what type of energy does a moving object have?

Answer 23

kinetic energy

Question 24

what is the unit for measuring energy?

Answer 24

joule

Question 25

name of the location where a circuit divides into different pathways

Answer 25

junction point

Question 26

rate of change in energy

Answer 26

amper

Question 27

what is the charge of an object after it is grounded?

Answer 27

neutral

Question 28

(device) what is an insulator?

Answer 28

it keeps charge in one place

Question 29

(device) what is a conductor?

Answer 29

it allows charges to move more easily

Question 30

what is an electric force?

Answer 30

it is a force at a distance

Question 31

how do you increase electric force

Answer 31

increase amount of charge in objects; | decrease distance between charged objects

Question 32

device that scientists used to create static charges

Answer 32

Van de Graaf generator

Question 33

what is an acetate?

Answer 33

acetate is a transparent piece of plastic

Question 34

like charges ______

Answer 34

repel

Question 35

opposite charges ______

Answer 35

attract

Question 36

charged objects _________

Answer 36

are attracted to neutral objects

Question 37

(force) if you increase the amount of charge on objects,

Answer 37

you increase the electric force

Question 38

(force) if you increase the distance between objects,

Answer 38

you decrease the electric force

Question 39

how to calculate power?

Answer 39

Power = Energy x time

Question 40

how to calculate energy

Answer 40

Energy = Power x time

Question 41

how to calculate joules?

Answer 41

watts x seconds

Question 42

the two terminals of a flashlight battery

Answer 42

electrodes

Question 43

the moist paste that electrodes sit in

Answer 43

electrolyte

Question 44

subatomic particle with a positive charge

Answer 44

proton

Question 45

subatomic particle with a negative charge

Answer 45

electron

Question 46

a push or pull

Answer 46

force

Question 47

a force that only have an effect on objects they touch

Answer 47

contact force

Question 48

the act of allowing charge to flow into Earth's surface

Answer 48

grouding

Question 49

the end points where a connection is made

Answer 49

terminals/electrodes

Question 50

the ability to do work

Answer 50

energy

Question 51

a sudden increase of voltage to tens and thousands of volts

Answer 51

electrical surge

Question 52

an electrical component that has a specific resitance

Answer 52

resistor

Question 53

how does an atom become positive?

Answer 53

it gains protons

Question 54

how does an atom become negative?

Answer 54

it gains electrons

Question 55

charging by conduction

Answer 55

charging a neutral object by touching it to a charged object

Question 56

charging by induction

Answer 56

temporarily "charging" a neutral object by bringing a charged object near it

Question 57

conventional current

Answer 57

positive terminal > circuit > negative

Question 58

electron flow

Answer 58

negative terminal > circuit > positive

Question 59

if 4.0 A of current enters the junction point of a parallel circuit, how much total current must leave that junction point?

Answer 59

4.0 A

Question 60

define electric power

Answer 60

the rate at which electric potential energy is transformed

Question 61

charging by friction

Answer 61

when objects rub together and electrons move from the surface of one object to the other