review doc

Question 1

the type of current in which electrons alternate direction of flow as the electric potential switches back and forth

Answer 1

alternating current

Question 2

The SI unit for current flow

Answer 2

Ampere (amp, A)

Question 3

amount of charge per second, or how many electrons are flowing past a particular point in the current in 1 second

Answer 3

ampere

Question 4

1 AMP (A) equals __________________

Answer 4

1 coulomb (C) flowing by in 1 second

Question 5

The SI unit of measurement for frequency

Answer 5

Hertz

Question 6

1 Hz is defined as ____________________

Answer 6

1 cycle per second

Question 7

acts in the same manner as a fuse. If the current flowing through it rises above a certain level, the ____________ flips its internal switch to open the circuit and stop the electric flow.

Answer 7

circuit breaker

Question 8

A metal or other substance with electrons that are free to produce a current

Answer 8

conductor

Question 9

The SI unit equal to the electrical charge

Answer 9

Coulomb

Question 10

how many electrons in a Coulomb?

Answer 10

of 6.25 x 10^18 electrons

Question 11

C = _________

Answer 11

J/V

Question 12

The SI unit of electromotive force

Answer 12

volts

Question 13

measure the different potential energy that exists between one point and the other. This measures the energy potential that a given circuit can provide

Answer 13

volts

Question 14

volts can also be seen as a ratio of ___________________________

Answer 14

potential energy to charge

Question 15

The higher the voltage, the _______ electrical current will flow in the circuit. It is a measure of Potential Difference

Answer 15

more

Question 16

A ________ is the amount of energy (in Joules) that an electrical device (such as a light) is burning per second that it’s running.

Answer 16

watt

Question 17

1 Watt = ______

Answer 17

J/s

Question 18

the force of attraction or repulsion acting along a straight line between two electric charges is directly proportional to the _____________________ and inversely to the ___________________________________

Answer 18

product of the charges, square of the distance between them

Question 19

current is symbolized by (___) and measured in __________ (__).

Answer 19

(I), amps (A)

Question 20

the quantity of electrons (“electrical charge”) flowing past a point in a circuit over a given time

Answer 20

current

Question 21

The type of current that flows in only one direction

Answer 21

direct current

Question 22

batteries produce ____________

Answer 22

direct current

Question 23

The closed pathway of an electric current.

Answer 23

electric circuit

Question 24

The principles of electrical charges in motion

Answer 24

electrodynamics

Question 25

The principles of nonmoving electrical charges

Answer 25

electrostatics

Question 26

a section of special wire, usually encased in glass, that quickly melts if the current flowing through it rises too high

Answer 26

fuse

Question 27

Something that is able to absorb electrical charges

Answer 27

ground

Question 28

Any charged object can be neutralized if it is grounded as a positively charged object _________________ from the earth and negatively charged objects ______________________ to the earth until it is neutrally charged

Answer 28

will take on electrons, will give off electrons

Question 29

The condition of an object that has gained a charge through friction, contact, or induction

Answer 29

electrification

Question 30

A substance that does not conduct electric current because its electrons are bound within the molecules and cannot freely move

Answer 30

insulators

Question 31

The SI unit for resistance

Answer 31

Ohm (shown by omega Ω)

Question 32

V = ________________

Answer 32

IxR; current x resistance

Question 33

I = ________

Answer 33

V/R; voltage/resistance

Question 34

R = ________

Answer 34

V/I; voltage/current

Question 35

The ability of an element in a circuit to resist the flow of electricity by reducing or impeding it

Answer 35

resistance

Question 36

the amount of resistance of a conductor depends on four things

Answer 36

material, length, cross-sectional area, temperature

Question 37

resistant materials have _________________ (insulators) unlike good conducting materials (metals)

Answer 37

virtually no free electrons

Question 38

long conductor has (more/less) resistance

Answer 38

more

Question 39

A conductor with a large cross-sectional area will have (lower/higher) resistance because there is a greater external surface area on which the electrons can travel

Answer 39

lower

Question 40

in metallic conductors, temperature is _______________________ to resistance.

Answer 40

directly proportional

Question 41

as temperature increases, resistance _________

Answer 41

increases

Question 42

The energy of an object in motion

Answer 42

kinetic energy (KE)

Question 43

the energy that is possessed by an object due to its motion or due to its position

Answer 43

mechanical energy

Question 44

Mechanical energy can be ______________

Answer 44

either kinetic or potential

Question 45

Stored energy

Answer 45

potential energy (PE)

Question 46

The force of attraction between all the particles of a nucleus, both protons and neutrons

Answer 46

strong nuclear force

Question 47

the energy contained within a system that is responsible for its temperature

Answer 47

thermal energy

Question 48

__________ is the flow of thermal energy

Answer 48

heat

Question 49

the force needed to accelerate one kilogram of mass at the rate of one meter per second squared

Answer 49

newton

Question 50

1 N=_____________

Answer 50

1 kg(m/s2)