Science physics chapter 12

Question 1

What is current electricity?

Answer 1

is the movement of electric charge (electron) through a conductor (copper wire) in a controlled way,

Question 2

What is static electricity?

Answer 2

is the movement of electrons in an uncontrolled way.

Question 3

does current electricity move easily through a conductor?

Answer 3

yes

Question 4

does current electricity move easily through a insulator?

Answer 4

no

Question 5

What does current electricity require to create a flow of electrons?

Answer 5

electrical energy

Question 6

What is a conductor?

Answer 6

a material that transmits thermal energy or electrical energy easily

Question 7

What’s a insulator?

Answer 7

a material that resists or blocks the flow of electrons through it

Question 8

what does conductivity mean?

Answer 8

a measure of a materials ability to conduct electricity

Question 9

what are electric circuits

Answer 9

a continuous path in which electrons can flow

Question 10

what is a load?

Answer 10

a part of a circuit that converts electrical energy to other forms of energy

Question 11

give examples of a load

Answer 11

eg. Lightbulbs, fans, heaters, computers, tv

Question 12

what is a switch?

Answer 12

a device that controls the flow of electrons by opening, or closing the circuit eg…. a light switch or a ON/OFF switch

Question 13

what is electrical energy?

Answer 13

the energy provided by the flow of electrons in a circuit

Question 14

what is a current?

Answer 14

the amount of electrons passing through a point in a circuit (Amps)

Question 15

what is potential Difference

Answer 15

the difference in energy from one part of a circuit to another (Voltage)

Question 16

What is resistance?

Answer 16

the opposition to the flow of electrons

Question 17

What is power?

Answer 17

the amount of energy used in a period of time

Question 18

what is a primary cell?

Answer 18

an electric cell that may be only used once

Question 19

what is a secondary cell?

Answer 19

an electric cell that can be recharged

Question 20

what is a fuel cell?

Answer 20

is an electric cell through which a continuous supply of chemicals is pumped as the cell operates, thus they require continuous supply of fuel in the form of hydrogen gas, oxygen gas to provide electrical energy.

Question 21

what is a direct current (DC)

Answer 21

is the flow of electrons in one direction through an electric circuit. Produced by electric cells (batteries)

Question 22

what is a alternating current (AC)

Answer 22

is the flow of electrons that alternates in direction in an electric circuit, i.e. with the use of a switch the electron flow can be back and forth. Produced in generating plants (your home wall outlet)

Question 23

What is the metric unit for a current?

Answer 23

A (ampere)

Question 24

What is the metric unit for a pontential difference?

Answer 24

V (voltage)

Question 24

what is the metric unit for resistance?

Answer 24

Ω

Question 25

What is the math symbol for a current?

Answer 25

I

Question 26

What is the math symbol for Potential difference?

Answer 26

V

Question 27

What is the math symbol for resistance?

Answer 27

R

Question 28

What is the name of the measuring device of a current?

Answer 28

Ammeter

Question 29

What is the name of the measuring device of potential difference?

Answer 29

Voltmeter

Question 30

What is the name of the measuring device of resistance?

Answer 30

Ohmmeter

Question 31

Where does half of ontarios electricity come from?

Answer 31

nuclear power

Question 32

what is the other half of ontarios electricity?

Answer 32

hydroelectricity, coal, natural gas and wind

Question 33

Where does most of ontarios population live?

Answer 33

Southern part of the province

Question 34

where are most electricity generation stations in ontario? why?

Answer 34

in the southern half of the province, the demand for the power is the greatest.

Question 35

What is the OPG

Answer 35

the Ontario Power generation is a government owned company that generates about 2/3 of ontarios electricity.

Question 36

How many generating stations does the opg own across Ontario

Answer 36

73 generating stations