Electricity Exam review 2

Question 1

Static electricity?

Answer 1

occurs when there is an imbalance between negative and positive charges in an object

Question 2

current electricity?

Answer 2

the flow of electrons through a conductor

Question 3

the 3 methods of charging?

Answer 3

friction, contact, induction

Question 4

friction?

Answer 4

occurs when 2 neutral materials are rubbed together and charges transfer from one object to the other.

Question 5

contact?

Answer 5

charging an object by contact with a charged object.

Question 6

induction?

Answer 6

charging a neutral object by bringing a charged object close but not touching. must use grounding

Question 7

electric discharge?

Answer 7

2 charges with a charge imbalance are together to come in contact, electrons transfer from one to the other.

Question 8

electrostatic series

Answer 8

the higher it is the more positive. the lower it is the more negative

Question 9

conductor?

Answer 9

material that allowed electrons to flow through them. ex metal or water.

Question 10

insulator?

Answer 10

material that does now allow electrons to flow through them. ex non metals like rubber, plastic or styraphome.

Question 11

methods of generating electricity?

Answer 11

fossil fuels, nuclear, solar, wind, tidal, hydroelectric,

Question 12

how does electricity to get to our house.

Answer 12

through transmission and distribution power lines.

Question 13

hydro electric advantages and disadvantages?

Answer 13

advantages: does not pollute water or air. is renewable.
Disadvantages: impacts fish. floods.

Question 14

wind advnatges and disadvantages?

Answer 14

advantages: cost effective. one turbine produces electricity for 2500 homes
Disadvantages: noisy. pricy.

Question 15

tidal advantages and disadvantges?

Answer 15

advantages: renewable. does not pollute
disadvantages:used only in coastal areas. only works when tidal moves.

Question 16

fossil fuels advantages and disadvantages?

Answer 16

advantages:easier to transport. found easily
disadvantages: greenhouse gases. dangerous to workers.

Question 17

solar advantages and disadvantages?

Answer 17

advantages: operates independent. lasts up to 40 years
disadvantages: only su efficient. needs a lot of sun.

Question 18

nuclear advantages and disadvantages?

Answer 18

advantages: large source of clean energy. jobs
disadvantages: accidents. health problems.

Question 19

parts of a circuit?

Answer 19

switch, source, load, conductor

Question 20

switch?

Answer 20

controls flow of electrons

Question 21

conductor?

Answer 21

provides a path for electrons to flow

Question 22

load?

Answer 22

converts electrical energy into other forms of energy(light bulb, motor)

Question 23

source?

Answer 23

the source of electrons. ex battery

Question 24

parallel circuit?

Answer 24

loads are connected. multiple paths for electrons to dlow

Question 25

series circuit

Answer 25

only one path for electrons to flow