S2 Electricity

Question 1

What are the 3 fossil fuels?

Answer 1

Coal, oil and natural gas

Question 2

What are 3 disadvantages of fossil fuels?

Answer 2

They are finite
They contribute to acid rain
They produce greenhouse gases which contribute to global warming

Question 3

What does the word ‘finite’ mean?

Answer 3

It is limited in supply and will one day run out

Question 4

Why will we never run out of renewable sources?

Answer 4

They are replenished at the same rate as they are used up

Question 5

What are the 4 main renewable sources?

Answer 5

Solar, wind, hydroelectric and biomass

Question 6

What is the name of the particle responsible for electricity?

Answer 6

The electron

Question 7

What type of charge do electrons have?

Answer 7

Negative

Question 8

What happens when a positive and a negative charge are close to each other?

Answer 8

They attract

Question 9

What happens when two negative charges are close to each other?

Answer 9

They repel

Question 10

What happens when to positive charges are close to each other?

Answer 10

They repel

Question 11

What is static electricity?

Answer 11

The build up of charge in one place

Question 12

What is the name of the particle which is transferred to cause static electricity?

Answer 12

Electrons

Question 13

What is electric current?

Answer 13

The flow of charged particles (electrons)

Question 14

What is the unit used to measure current?

Answer 14

Amps (A)

Question 15

What device is used to measure current?

Answer 15

Ammeter

Question 16

What is voltage?

Answer 16

The energy given to each charge as it passes through the power supply

Question 17

What unit is used to measure voltage?

Answer 17

Volts (V)

Question 18

What device is used to measure voltage?

Answer 18

Voltmeter

Question 19

How is an ammeter connected in circuits?

Answer 19

It is placed in series with the other components in the circuit.

Question 20

How is a voltmeter connected in circuits?

Answer 20

It is placed across (in parallel) the component you wish to measure the voltage of.

Question 21

What is the energy change that takes place in a cell?

Answer 21

Chemical energy –> electrical energy

Question 22

What is an electrochemical cell made of?

Answer 22

Electrodes (two different metals) and an electrolyte

Question 23

What is a battery made of?

Answer 23

Multiple cells joined together

Question 24

What is a series circuit?

Answer 24

A circuit that has only one path that the electrical current can flow – a continuous loop.

Question 25

What is a parallel circuit?

Answer 25

A circuit that has branches. The current has many paths it can take.

Question 26

In a series circuit with multiple lamps, what happens if one lamp breaks?

Answer 26

All the lamps go out - there is now a gap in the circuit.

Question 27

In a parallel circuit with multiple lamps, what happens if one lamp breaks?

Answer 27

The other lamps stay on - there is multiple paths for the current to flow.

Question 28

Which type of circuit is used in household lighting?

Answer 28

Parallel circuits are used for household lighting.

Question 29

What happens to current in a series circuit?

Answer 29

Current is the same at all points in a series circuit.

Question 30

What happens to voltage in a series circuit?

Answer 30

The voltage from the battery splits across each of the different component.

Question 31

What happens to current in a parallel circuit?

Answer 31

The current from the supply splits across each of the branches in a parallel circuit.

Question 32

What happens to voltage in a parallel circuit?

Answer 32

Each branch recieves the supply voltage.