electricity

Question 1

voltage

Answer 1

the energy transfer per unit of charge in a circuit

Question 2

units of voltage

Answer 2

Volts

Question 3

current

Answer 3

the rate of flow of charge

Question 4

symbol for current

Answer 4

I

Question 5

units of current

Answer 5

amperes

Question 6

what do you use to measure current

Answer 6

ammeter

Question 7

what do you use to measure voltage

Answer 7

voltmeter

Question 8

how do connect a voltmeter

Answer 8

in parrallel

Question 9

how do you connect a ammeter

Answer 9

in series

Question 10

Diodes

Answer 10

allows electricity to flow in only one direction

Question 11

LED stands for…

Answer 11

Light emitting diode

Question 12

conducters

Answer 12

components that allow electrons to flow through them

Question 13

what are good conductors and why?

Answer 13

metals, delocalized electrons(free to move)

Question 14

resistance

Answer 14

oppose the flow of electric current

Question 15

rheostat

Answer 15

a variable resistor

Question 16

how can you make a rheostat

Answer 16

changing length of resitor

Question 17

how do light bulbs work

Answer 17

high resistance wire, current passes through and so wire heats up ad gets so hot it lights up

Question 18

what type of energy conversion happens in light bulbs

Answer 18

electrical energy converted to light energy

Question 19

cell

Answer 19

a source of electrical energy

Question 20

battery

Answer 20

2 or more cells connected together

Question 21

what type of wire do light bulbs have

Answer 21

tungsten(W) wire

Question 22

what is the chemical name for tungsten

Answer 22

wolfram

Question 23

conventional current direction

Answer 23

negative to positive

Question 24

unit of measurement for resistance

Answer 24

ohms

Question 25

what affects resistors

Answer 25

material, length, thickness, temperature

Question 26

what is the exception for non-metals(they aren’t conductors)

Answer 26

graphite

Question 27

how does the thickness of a wire effect the resistance

Answer 27

the thicker the wire the less resistance

Question 28

how does the length of a wire effect the resistance

Answer 28

the longer the wire is the more resistance it has

Question 29

what type of relationship does the length of the wire have to the current

Answer 29

inversely proportional

Question 30

how does the temperature effect the resistance

Answer 30

the hotter the resistor the more resistance

Question 31

what happens to the voltage in a parallel circuit

Answer 31

it stays the same throughout the circuit

Question 32

what happens to the current in parallel circuit

Answer 32

it splits up into each branch(the total resistance of the circuit = current of each branch added)

Question 33

what happens to the light bulbs brightness in a parallel circuit(if there is more than one)

Answer 33

they all have the same brightness

Question 34

what happens to the current in a series circuit

Answer 34

the current stays the same throughout

Question 35

if batteries are connected in series what is the total voltage

Answer 35

sum of voltage of each battery

Question 36

what is the symbol for resistance

Answer 36

R

Question 37

higher resistance means … current

Answer 37

lower

Question 38

lower resistance means … current

Answer 38

higher

Question 39

ohm’s law

Answer 39

V= I x R

Question 40

what direction does the electronic current flow

Answer 40

positive to negative