Chapter 9

Question 1

What do cells store

Answer 1

Cells store chemical energy that can be changed to electrical energy in a circuit

Question 2

What does a battery contain

Answer 2

A battery contains two or more cells joined together

Question 3

The cell in a circuit has two connections called?

Answer 3

terminals

Question 4

What symbols are terminals labelled with

Answer 4

+ and - symbols

Question 5

When connected into a circuit, what does the negative terminal of a cell, battery or power supply do?

Answer 5

The negative terminal of a cell, battery or power supply pushes electrons around in the wires

Question 6

Are electrons smaller than atoms?

Answer 6

yes

Question 7

The flow of electrons in the circuit is called what?

Answer 7

current

Question 8

Electrons have what type of charge?

Answer 8

negative charge

Question 9

Opposite charges___

Answer 9

attract

Question 10

Like/ Same charges___

Answer 10

repel

Question 11

positive and negative attract or repel?

Answer 11

attract

Question 12

positive and positive repel or attract?

Answer 12

repel

Question 13

negative and negative repel or attract?

Answer 13

repel

Question 14

What is the function of an ammeter

Answer 14

measures the current in the circuit

Question 15

What is the function of a cell

Answer 15

provides energy to make current flow

Question 16

What is the function of a lamp

Answer 16

gives out light

Question 17

What is the function of an opened switch

Answer 17

stops the flow of current when opened

Question 18

What is the function of a closed switch

Answer 18

starts the flow of current when closed

Question 19

What is the function of a buzzer

Answer 19

making a buzz sound

Question 20

draw the symbol of an ammeter

Answer 20

pg 300

Question 21

draw the symbol of a cell

Answer 21

pg 300

Question 22

draw the symbol of a lamp

Answer 22

pg 300

Question 23

draw the symbol of an opened switch

Answer 23

pg 300

Question 24

draw the symbol of a closed switch

Answer 24

pg 300

Question 25

draw the symbol of a buzzer

Answer 25

pg 300

Question 26

What are the purpose for circuit symbols

Answer 26

there is no confusion

Question 27

In the circuit symbol for a cell, which is the positive and which is the negative line

Answer 27

The positive is the longer of the two lines and the negative is the shorter line

Question 28

In the circuit symbol for a cell,which side is the negative line(short one) and which side is the positive line(long one) at?

Answer 28

Negative short line is on the right while Positive long line is on the left with space between them.

Question 29

Draw a diagram with a switch, cell and buzzer

Answer 29

pg 301

Question 30

What can a circuit containing a cell, a switch and a buzzer be used for?

Answer 30

Doorbell. If the switch is pushed outside a door, it can make the buzzer sound and attract attention inside.

Question 31

Draw a circuit diagram that contains a cell, a switch, a lamp and an ammeter

Answer 31

pg 301

Question 32

How can an ammeter help by measuring the current?

Answer 32

You could tell if the cell needs to be replaced, a smaller current means the cell is low on energy

Question 33

When electrons move more quickly, the current_____

Answer 33

increases

Question 34

When electrons move more slowly, the current_____

Answer 34

decreases

Question 35

Current is measured in units called_____

Answer 35

amps

Question 36

Amps have the symbol___

Answer 36

A

Question 37

Do ammeters have 2 terminals?

Answer 37

yes

Question 38

What colours are the 2 terminals of an ammeter

Answer 38

one is red and the other is black

Question 39

In a circuit, the red terminal of the ammeter must be connected to the __________

Answer 39

positive terminal of the power supply

Question 40

What are electrical conductors?

Answer 40

Conductors are materials that conduct electricity

Question 41

can electric current flow through conductors?

Answer 41

yes

Question 42

What are electrical insulators

Answer 42

materials that do not allow current to flow through

Question 43

does adding or removing components affect the current of the circuit?

Answer 43

Yes, depending on what components are changed

Question 44

Does increasing the cell in an circuit increase the current? (doubling it)

Answer 44

yes

Question 45

Current is the same at all positions in a series circuit, true or false?

Answer 45

True

Question 46

The circuit with two lamps transfer twice as much energy as the circuit with one lamp. The lamps will be ____

Answer 46

dimmer

Question 46

What does the term dimmer mean?

Answer 46

That means they do not shine as brightly.

Question 47

Does increasing the lamp make the electrons move slowly? (halved aswell)

Answer 47

Yes