Electricity

Question 0

A closed pathway that has different paths is called

Answer 0

A parallel circuit

Question 1

A circuit that has only one path of current is called

Answer 1

A series current

Question 2

What are the characteristics of of a series’s circuit

Answer 2

Current is the same in every resistor; current is equal to the battery
Sum of the voltage drops across the individual resistors = voltage rating of the battery
Total resistance of the resistors is =sum of the resistant values

Question 3

describe electrical forces

Answer 3

are formed form particles in atoms: nucleus, electron and proton

Question 4

What is a charge

Answer 4

the attracting and repelling forces

Question 5

If an atom has electrons taken away it has a ________ Charge

Answer 5

positive

Question 6

If an atom has on electron removed, and has one more proton than electron, what is it’s charge?

Answer 6

positive

Question 7

Coulombs law: the _________ varies directly as the product of the charges and inversely as the square of the ________

Answer 7

force

distance

Question 8

What is the SI symbol for coulomb?

Answer 8

C

Question 9

What are the basics of what makes a good conductor?

Answer 9

they allow electrons to move
electrons are “loose”
mostly metals

Question 10

Describe what is going on with the atoms of insulators

Answer 10

they are tightly bound
electrons are bound - and they are poor conductors - they “hold” their electrons
resist flowing charges - ex glass, rubber

Question 11

What are the three ways to electrically charge objects?

Answer 11

by friction
by contact - transference
induction - without physical contact

Question 12

What does grounding do?

Answer 12

conducts a pathway to an infinite reservoir of electric charge

Question 13

When something is electrically polarized, what can we say about the object?

Answer 13

there is an alignment of the charges, an electric dipole - not totally even, but a little more positive on one side and a little more negative on the other side

Question 14

Why do electric have a vector quality?

Answer 14

they have a magnitude and direction

Question 15

What is static electricity?

Answer 15

electric charge that has built up in once place

does not flow, but may jump from place to place

Question 16

What are the three things that atoms are composed of?

Answer 16

protons
electrons
neutrons

Question 17

The transfer of _______ between objects is the basis of electrostatics

Answer 17

electrons

Question 18

If an object has extra electrons, it’s charge will be________ charge

Answer 18

negative

Question 19

If an object has a loss of electrons it will have a ________ charge

Answer 19

positive

Question 20

If an object has the same number of electrons and protons it is

Answer 20

neutral

Question 21

What does the law of conservation state?

Answer 21

that electrons are neither created or destroyed, but transferred from one object to another

Question 22

Opposite charges ___________

Negative charges __________

Answer 22

attract

repel

Question 23

describe how you charge an object by the use of friction

Answer 23

rub materials together the a high affinity for electrons against something with a lesser affinity for electrons - they electrons will transfer to the first object making it negatively charged

Question 24

How do you charge an object by contact or conduction?

Answer 24

touch to induce | requires a conductor not an insulator

Question 25

How do you charge an object by induction?

Answer 25

no contact | electrons move as a result of the charge in the second object

Question 26

What is a resistor?

Answer 26

reduces or varies the electric current - allows current to flow, but resists the flow

Question 27

How much current ther is depends on not only the voltage, but also on the ___________

Answer 27

electrical resistance

Question 28

electrons always move from a _______ charge to a __________ charge

Answer 28

positive | negative

Question 29

Describe electric potential

Answer 29

energy per charge how strong in Volts Volts = joules/coulombs

Question 30

What is a capacitor?

Answer 30

a charged capacitor discharges when a conducting path is provided between the plates

Question 31

What is voltage?

Answer 31

it is an electric pressure that produces a current of flow of charge

Question 32

What is DC?

Answer 32

one direction | direct current

Question 33

Electricity flows from _________ charge to _________ charge

Answer 33

high | low

Question 34

What is the charge of the electrons that flow?

Answer 34

negative

Question 35

Charge will flow between points until the is no longer a _______________

Answer 35

potential difference

Question 36

Describe electric current

Answer 36

the rate of flow of charge

Question 37

What is something that provides a potential difference between 2 points that causes current to flow

Answer 37

Voltage source batteries, generator electric pump

Question 38

What does electrical resistance depend on?

Answer 38

conductivity of the wire thickness of the wire length of the wire temperature

Question 39

____________ - explains the relationship between voltage, current and resistance Volts = Amps * Resistance

Answer 39

Ohms Law

Question 40

A simple circuit requires which three things?

Answer 40

load, conductor source

Question 41

What does a diode do?

Answer 41

converts AC -> DC | acts as a one way valve

Question 42

What does a capacitor do?

Answer 42

acts as a reservoir for changing AC -> DC | - smooths the electrical waves out

Question 43

What is the equation to calculate power (watts)?

Answer 43

``` power = current * voltage W= Amps * V ```

Question 44

Describe electric polarization

Answer 44

When the atoms line up with the negative and positive all in one direction

Question 45

What is electric potential?

Answer 45

electric potential energy/charge | voltage = electric potential energy (j)/charge(C)

Question 46

The SI unit for electric potential energy is the joule. what is the SI unit for electric potential?

Answer 46

Volt

Question 47

What is electric current?

Answer 47

the flow of electric charge

Question 48

What is an ampere?

Answer 48

An ampere is the flow of 1 coulomb of charge per second

Question 49

As more and more resistors are added in parallel to a circuit, the equivalent resistance of the circuit _________ (increases/decreases?)

Answer 49

decreases

Question 50

Electrical ________ arise because of the way like _______, opposite ________

Answer 50

forces charges repel charges attract

Question 51

Give an example of charging by friction

Answer 51

charge rod contacts neutral object - charge will transfer

Question 52

What is electrical resistance?

Answer 52

how hard it is for the electric chagre to flow

Question 53

What is drift speed?

Answer 53

the speed at witch electrons travel through a conductor, 0.01 cm/s

Question 54

Electric potential energy is measured in ________ we also call this potential ___________

Answer 54

Volts | Difference