Physics P1 4.6 Big energy issues.

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A constant amount of electricity is provided by nuclear, coal-fired and oil-fired power stations, what is this called?
The base load demand.
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How does the demand for electricity vary?
It varies during the day and night and between summer and winter.
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How is the variable demand met?
Using gas-fired power stations, pumped-storage schemes and renewable energy sources.
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What happens when demand for energy is low?
Energy is stored by pumping water to the top reservoir of pumped storage schemes.
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How do start-up times of different types of power stations differ?
Gas-fired power stations have the shortest start-up times and nuclear power stations have the longest.
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Why does the demand for electricity vary between summer and winter?
The demand increases in winter because it gets colder so more electricity is used heating homes.
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In what form is energy stored in the top reservoir of a pumped storage scheme?
Gravitational potential energy.
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What is likely to contribute to future energy supplies?
Nuclear power stations, fossil-fuel per stations using carbon capture ad renewable energy are all likely to contribute to future energy supplies.
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**YOU MAY BE ASKED TO ARGUE FOR OR AGAINST A PARTICULAR TYPE OF PWER STATION IN AN EXAM QUESTION. MAKE SURE YOU USE THE DATA PROVIDED IN YOUR ANSWER TO ENSURE MARKS**
**LOOK U[P EXAMPLES OF ELECTRICITY DEMAND GRAPHS AND CHARTS**
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Other cards in this set

Card 2

Front

How does the demand for electricity vary?

Back

It varies during the day and night and between summer and winter.

Card 3

Front

How is the variable demand met?

Back

Preview of the front of card 3

Card 4

Front

What happens when demand for energy is low?

Back

Preview of the front of card 4

Card 5

Front

How do start-up times of different types of power stations differ?

Back

Preview of the front of card 5
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