circuits and components

Question 1

Define current

Answer 1

The flow of electrical charge around a complete circuit per-second.

Question 2

Define switch

Answer 2

A component that controls a current by making or breaking a circuit

Question 3

Define voltemeter

Answer 3

A device used to measure used to measure ‘potential difference’. It is always ‘in parralel’

Question 4

Define ammeter

Answer 4

A device used to measure electrical current in a circuit.

Question 5

Define potential difference

Answer 5

A measure of the push of a cell or battery, or the energy a battery or cells supplies to set the electrical charge in movement.

Question 6

Define cell:

Answer 6

A chemical store of energy that supplies energy ‘ or a push’ to the electrical charge ( electrons) to set it into motion ( movement of electrons around a complete circuit)

Question 7

Define battery

Answer 7

Two or more electrical cells oined together

Question 8

Define amps

Answer 8

Units of measurement of electrical current , symbol (A)

Question 9

Define motor

Answer 9

A component or machine that spins when current flows through it.

Question 10

How can you measure current

Answer 10

You measure current using an ammeter

Question 11

What is the units of measuring current

Answer 11

Amps ( symbol A)

Question 12

What is required for ammeters in order to be in a circuit and work.

Answer 12

It has to be connected to the same line, in other words it as to be ‘ IN SERIES ‘

Question 13

Draw a circuit that has a
1- wire
2- cell
3- bulb
4- resistor
5- ammeter
6- voltemeter

Answer 13

Mark accordingly:

1- Wires have to be straight lines drawn using a ruler.

2- Cell has 2 side, long side (positive) and short side ( negative)

3- Bulb is a big circle with an x drawn on it.

4- Resistor is opposite to the cell and is a rectangle with wires connected to both sides

5- Ammeter is a circle with a capital A. It has to be in series meaning in the same line as every other component.

6-Voltemeter is a circle with a capital V. It has to be in parrallel meaning in a different line as every other component

Sorry it is complicated but i don’t know how to add the photo so I just explained how it should look like.

hehehehehe yarrrrr

fatma was here :l ^-^

Question 14

What makes a battery

Answer 14

2 or more cells

Question 15

How are wires represented in circuit diagrams

Answer 15

Wires are reprsesnted with straight lines

Question 16

How can a battery or cell result in an incomplete circuit

Answer 16

Circuits are incomplete when you cannot follow the circuit from one end of the battery, through the different components, to the other end of the battery. If the circuit is incomplete, it won’t work.

Question 17

Draw each of the following

1- open switch
2- closed switch
lamp
resister
cell
motor
wire
buzzer
ammeter
battery
voltemeter

Answer 17

( check powerpoint)

Question 18

How can you decrease resistance

Answer 18

add an extra branch to the circuit

Question 19

What happens to the current and resistance when you add components

Answer 19

Adding components gives more places for current to flow, increasing the total current, and decreasing the total resistance.

Question 20

What happens to p.d and current is series circuit

Answer 20

Current: same
P.d: Different

Question 21

What happens to p.d and current is parallel circuit

Answer 21

Current: different
P.d: same

Question 22

Draw an example of series circuit

Answer 22

All the components are connected to one wire ( one line)

Question 23

How does analogies and models help us

Answer 23

Models and analogies help us to think about electric currents in different ways. They help us to “picture” what is going on inside e.g. wires, bulbs and cells/batteries.

Question 23

draw 2 examples of a parallel circuit.

One with a voltemeter and one without

Answer 23

2 or more branches, not the same line. Voltemeter in a different line

Question 24

Which side of the battery is positive and which side is negative

Answer 24

the positive side of the battery is the longer side and the negative side is the shorter side

Question 25

True or false:

Battery produces the charge

Answer 25

False. the charge in already in the wire. The battery just provides in with energy to set the charge in motion

Question 26

Draw a battery

Answer 26

It is supposed to be long line,short line, long line then short line.

Not long line, short line,short line, long line

Question 27

How can a closed switch result in an incomplete circuit

Answer 27

You need to close the gap and make a complete circuit for a current to flow.

Question 28

What are electrical wires usually made of and why

Answer 28

made of metals typically copper because they good insulators of electricity .

Question 29

What happens if a circuit is incomplete?

Answer 29

The flow of charge won’t go through every component and go from one end of the battery to another therefore the reciever won’t work.

Question 30

Fill in the blanks:
https://docs.google.com/document/d/101SXy55cx9yojDi65ff_5dqdAGNg4cxNvC5mfkwXbxs/edit

Answer 30

Answers on the second page

Question 31

(b) Which part of the circuit supplies the energy?

Answer 31

battery/cell

Question 32

what does a circuit need and give examples

Answer 32

Electrical source: Battery/cells
Electrical receiver: Bulb, motor, buzzer
Electrical components Wires, switch

Question 33

What are electrcial conductors and give examples of good electrical conductors

Answer 33

They let electricity pass through them easily. <any metals such as copper,iron and steel are good electrical conductors.

Question 34

what are electrical insulator and give examples

Answer 34

Materials that don’t allow electricity to pass through them such as rubber,plastic and wood.

Question 35

why are electrical insulator used to cover up the wire

Answer 35

prevent you from getting an electric shock