Chapter 8 - charge and current

Question 1

equation relating charge current and time

Answer 1

I = Q / t

Question 2

what is electric current

Answer 2

rate of flow of charge

Question 3

what does e represent

Answer 3

elementary charge

Question 4

two examples of charge carriers

Answer 4

-electrons
-ions

Question 5

what is conventional current

Answer 5

the rate of flow of charge from positive to negative

Question 6

how can current be measured

Answer 6

connect ammeter in series with component

Question 7

kirchoffs first law

Answer 7

all current going into a junction is equal to the current exiting a junction

Question 8

mean drift velocity definition

Answer 8

average velocity of electrons as they travel down the wire

Question 9

what equation uses MDV to calculate current

Answer 9

I = Anev

Question 10

base unit for current

Answer 10

amperes

Question 11

what do opposite charges do

Answer 11

attract each other

Question 12

elementary charge value

Answer 12

1.6 x 10^-19

Question 13

what are electrically conducting liquids called

Answer 13

electrolytes

Question 14

what law relates to kirchoffs first law

Answer 14

conservation of charge law

Question 15

what is the number density of a material

Answer 15

number of free electrons per unit volume

Question 16

do conductors have a high or low number density

Answer 16

high