Electricity

Question 1

What is static electricity?

Answer 1

Static electricity is when an object either gains or loses electric charge in the form of electrons.

Question 2

Can static electricity move?

Answer 2

No. Static electricity is a type of energy that can build up in one place but does not move.

Question 3

Objects that lose electrons become ____ charged.

Answer 3

Positively (+)

Question 4

Objects that gain electrons become ____ charged.

Answer 4

Negatively (-)

Question 5

How is static electricity generated?

Answer 5

Electrons are passed from one object to another by rubbing them together (i.e. friction)

Question 6

Charges that are the same _________ each other.

Answer 6

Repel

Question 7

Charges that are different _________ each other.

Answer 7

Attract

Question 8

What will happen when two negative charges are brought together?

Answer 8

They will repel.

Question 9

What will happen when a negative and positive charge are brought together?

Answer 9

They will attract.

Question 10

Describe current electricity.

Answer 10

When electrons move they carry electrical energy from one place to another.
This is called current electricity or an electric current.

Question 11

What is a circuit?

Answer 11

A circuit is a closed path or loop around which an electric current flows.

Question 12

Describe simply what electricity is.

Answer 12

Electricity is a flow of electrons from one place to another.

Question 13

What ‘pushes’ the electrons around a circuit?

Answer 13

A battery or power outlet creates the force that makes a current of electrons flow.

Question 14

The force created by a battery is called __________.

Answer 14

Voltage (or potential difference)

Question 15

What would happen if there is a break in the circuit?

Answer 15

Electricity would not flow

Question 16

What is a conductor?

Answer 16

Conductors are materials that allow electricity to flow freely e.g. copper wire.

Question 17

What is an insulator?

Answer 17

Insulators are materials that do not allow electricity to pass through them freely e.g. rubber, plastic.

Question 18

Describe the pathway of electrons in a series circuit.

Answer 18

In a series circuit there is only one pathway around which the electrons can travel.

Question 19

Describe the pathway of electrons in a parallel circuit.

Answer 19

In a parallel circuit there are different pathways the electrons can travel.

Question 20

What is the unit for current?

Answer 20

Ampere (A)

Question 21

What is the unit for voltage/potential difference?

Answer 21

Volts (V)

Question 22

In a circuit what scientific name do we give for ‘battery’?

Answer 22

We call a battery a ‘cell’.

Question 23

What is meant by the term ‘resistance’?

Answer 23

This refers to how easy or difficult it is for electrons to pass through a component.

Question 24

Resistance is measured in ________.

Answer 24

Ohms

Question 25

Which piece of equipment measures current?

Answer 25

Ammeter

Question 26

In an atom which particles can move from one object to an other?

Answer 26

Electrons - because they are very small and light.

Question 27

A neutral object has equal numbers of positive and negative _________.

Answer 27

Charges

Question 28

In a series circuit, what happens if one of the bulbs blows?

Answer 28

All the other components will not work because the circuit is broken.

Question 29

If you want to measure current in a circuit, how do you wire the ammeter?

Answer 29

You have to wire it in series.

Question 30

If you want to measure voltage in a circuit, how do you wire the voltmeter?

Answer 30

You have to wire it in parallel.

Question 31

On your learning tools app draw the symbol for a bulb.

Answer 31

Check your exercise book for the bulb symbol to see if you are correct.

Question 32

On your learning tools app draw the symbol for an open switch.

Answer 32

Check your exercise book for the open switch symbol to see if you are correct.

Question 33

On your learning tools app draw the symbol for an voltmeter.

Answer 33

Check your exercise book for the voltmeter symbol to see if you are correct.

Question 34

What does an ammeter measure?

Answer 34

Current

Question 35

When a wire increases in length how does this affect the resistance?

Answer 35

The resistance also increases

Question 36

How does the thickness of a wire affect resistance?

Answer 36

The thinner the wire the higher the resistance

Question 37

What is potential difference?

Answer 37

It is the ‘push’ from the battery that pushes the electrons around the electrical circuit. It is also known as 'voltage'.

Question 38

Define the term 'current'

Answer 38

An electric current is a flow of electrons/charge around a circuit. The faster the charge flow, the higher the current.

Question 39

What unit is current measured in?

Answer 39

Current is measured in Amps (A)

Question 40

What is the symbol for resistance and what unit is it measured in?

Answer 40

The symbol for resistance is R It is measured in Ohms (Ω)