Electricity

Question 1

What are the two types of current ?

Answer 1

Direct

Alternating

Question 2

How do the electrons work in direct current ?

Answer 2

The electrons move in one direction

Question 3

How do the electrons more in alternating current ?

Answer 3

The electrons more back and forth in alternating directions

Question 4

What is charge measured in ?

Answer 4

coulombs

Question 5

What is current measured in ?

Answer 5

Amps

Question 6

What do you use in a circuit to measure current ?

Answer 6

Ammeter

Question 7

Whats an ammeter used for ?

Answer 7

Measuring current in a circuit

Question 8

What does the current of a circuit depend on ?

Answer 8

Resistance of the circuit

Question 9

What’s potential difference measured in ?

Answer 9

Volts

Question 10

What’s a voltmeter used for ?

Answer 10

To measure the potential difference in a circuit

Question 11

What is energy measured in ?

Answer 11

Joules

Question 12

What does the line graph look like for a filament lamp ?

Answer 12

as temperature increase so does resistance

the graph looks like an s

Question 13

What happens in a series circuit if one bulb goes out ?

Answer 13

They all go out Because the current must flow through all the components in the circuit

Question 14

Whats the difference between a parallel circuit when a ammeter is placed in a series circuit ?

Answer 14

Wherever the ammeter is placed in the series circuit the current will measure the same

Question 15

How do you find the total resistance of a series circuit and why is it that simple ?

Answer 15

You add all the resistance together because the current must flow through all of them

Question 16

What is resistance measured in ?

Answer 16

Ohms

Question 17

Whats the difference in the electron movement in a parallel circuit ?

Answer 17

The electrons will not pass through very component so if one bulb blows out it will not ruin the rest of the circuit

Question 18

What’s the difference between where you place your ammeter in a parallel circuit ?

Answer 18

Depending on where you place it the amps/readings will be different all over the circuit

Question 19

What will be the difference in current around a parallel circuit when resistors are placed ?

Answer 19

resistors are connected in parallel the supply current is divided between them

Question 20

How does the temperature of the wire increase ?

Answer 20

As electrons flow through wires, they collide with the ions in the wire which causes the ions to vibrate more, This increased vibration of the ions increases the temperature of the wire

Question 21

What is power measured in ?

Answer 21

Watts

Question 22

With a colour is the earth wire in a plug ?

Answer 22

Green and yellow

Question 23

What colour is the neutral wire in a plug ?

Answer 23

Blue

Question 24

What colour is the live wire in a plug ?

Answer 24

Brown

Question 25

Why is the outer insulation of a plug plastic ?

Answer 25

Because its a poor conductor of electricity so its safe

Question 26

What does the fuse ensure and if something happens what does it do ?

Answer 26

It ensures that the circuit does not overheat and if so the fuse will blow and shut down the circuit

Question 27

What does the earth wire do ?

Answer 27

In the case of a fault the earth wire will transfer some of the energy to the ground so that the person does not get electrocuted

Question 28

What does the fuse do in plug (detailed answer) ?

Answer 28

fuse provides a built-in fail-safe to the electrical circuit for a device. The fuse contains a thin wire that will melt if the current gets too high. If there is a fault that causes the casing of the device to become live, a large current will flow through the low-resistance earth wire. This high current will cause the fuse to melt. Once the fuse has melted, the circuit is broken

Question 29

What are the 5 parts of the national grid ?

Answer 29

Power station TOP | Step up transformer | Transmission lines | Step down transformers | Consumers BOTTOM

Question 30

What does the national grid do ?

Answer 30

The National Grid distributes electricity across the country. The National Grid connects power stations to homes, workplaces and public buildings all around the country

Question 31

What are transformers used for ?

Answer 31

Transformers are used to change voltages and currents in transmission lines

Question 32

What depends on if a transformer is step up o down ?

Answer 32

The number of coils

Question 33

What are used to keep people safe from the wires ?

Answer 33

Pylons

Question 34

What does a step down transformer do ?

Answer 34

Decrease current to a safe use

Question 35

What 3 particles do atoms contain ?

Answer 35

Protons Neutrons Electrons

Question 36

What are the charged particles out of protons, neutrons and electrons ?

Answer 36

the protons and electrons are charged Neutrons have no charge

Question 37

What do the electros orbit in the atom ?

Answer 37

The nucleus

Question 38

Generally atoms are neutral what changes there charge ?

Answer 38

Loosing or gaining electron changes its charge

Question 38

Generally atoms are neutral what changes there charge ?

Answer 38

Loosing or gaining electron changes its charge

Question 39

What happens to the atoms charge if it loses an electron ?

Answer 39

It gets a positive charge +1

Question 40

What happens if an atoms charge if it gains an electron ?

Answer 40

It’s charge will become negative - 1

Question 41

What happens when to objects get rubbed together ?

Answer 41

They become electrically charged this is called friction when they rub and the electric charge is static electricity

Question 42

What happens to the materials electrons when they become rubbed together ?

Answer 42

Electrons, which are negatively charged, may be ‘rubbed off’ one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge

Question 43

Why do the electrons leave the atom in friction ?

Answer 43

Because they gain energy

Question 44

What’s different with conductors compared to insulators in friction ?

Answer 44

Insulators prevent the electrons from moving and the charge remains static. Conductors, on the other hand, cannot hold the charge

Question 45

What do all charged objects have around them ?

Answer 45

Electrical field

Question 46

what does the electrical field show ?

Answer 46

How the charged particles interact with each other

Question 47

What can be used in a circuit instead of a fuse ?

Answer 47

Circuit breaker

Question 48

What are the 3 components tested in the testing components practical ?

Answer 48

Resistor Filament lamp Diode

Question 49

What’s resolution ?

Answer 49

How much it goes up by in figure