electricity

Question 1

atoms are made of

Answer 1

protons, neutrons, electrons

Question 2

properties of conductors

Answer 2

• have low number of valence electrons
• give up valence electrons easily
• allow current flow with low resistance
  ex. silver, copper, gold, aluminum, carbon

Question 3

properties of insulators

Answer 3

• usually have 7-8 electrons in valence shell
• electrons are not given up easily
• resist flow of electricity
  ex. sulfur, silicone, rubber, plastic, glass

Question 4

current

Answer 4

total charge that passes through some point in the circuit per unit time
measured in Amperes

Question 5

voltage

Answer 5

measure of the force applied to charges
measured in volts

Question 6

resistance

Answer 6

measure of how much force is needed to pass electrical current through a substance
measure in ohms

Question 7

conductivity

Answer 7

measure of how easily a substance can pass electrical current
measured in siemens

Question 8

resistors in parallel equation

Answer 8

R total = 1/ ((1/R1)+(1/R2))

Question 9

junction rule

Answer 9

the sum of currents that enter a junction equals the sum of currents that leave

Question 10

ohm’s law

Answer 10

electric current through a conductor btw two points is directly proportional to the voltage across the two points

Question 11

ohm’s law formula

Answer 11

V = IR = I/g

Question 12

capacitance

Answer 12

the property of holding charge

Question 13

equivalent circuit

Answer 13

channels = conductors
ion gradients = batteries