S2 Electricity Flashcards

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1
Q

What are the 3 fossil fuels?

A

Coal, oil and natural gas

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2
Q

What are 3 disadvantages of fossil fuels?

A

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

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3
Q

What does the word ‘finite’ mean?

A

It is limited in supply and will one day run out

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4
Q

Why will we never run out of renewable sources?

A

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

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5
Q

What are the 4 main renewable sources?

A

Solar, wind, hydroelectric and biomass

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6
Q

What is the name of the particle responsible for electricity?

A

The electron

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7
Q

What type of charge do electrons have?

A

Negative

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8
Q

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

A

They attract

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9
Q

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

A

They repel

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10
Q

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

A

They repel

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11
Q

What is static electricity?

A

The build up of charge in one place

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12
Q

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

A

Electrons

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13
Q

What is electric current?

A

The flow of charged particles (electrons)

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14
Q

What is the unit used to measure current?

A

Amps (A)

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15
Q

What device is used to measure current?

A

Ammeter

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16
Q

What is voltage?

A

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

17
Q

What unit is used to measure voltage?

A

Volts (V)

18
Q

What device is used to measure voltage?

A

Voltmeter

19
Q

How is an ammeter connected in circuits?

A

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

20
Q

How is a voltmeter connected in circuits?

A

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

21
Q

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

A

Chemical energy –> electrical energy

22
Q

What is an electrochemical cell made of?

A

Electrodes (two different metals) and an electrolyte

23
Q

What is a battery made of?

A

Multiple cells joined together

24
Q

What is a series circuit?

A

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

25
Q

What is a parallel circuit?

A

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

26
Q

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

A

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

27
Q

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

A

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

28
Q

Which type of circuit is used in household lighting?

A

Parallel circuits are used for household lighting.

29
Q

What happens to current in a series circuit?

A

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

30
Q

What happens to voltage in a series circuit?

A

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

31
Q

What happens to current in a parallel circuit?

A

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

32
Q

What happens to voltage in a parallel circuit?

A

Each branch recieves the supply voltage.