The National Grid (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main purpose of the National Grid?
What is the main purpose of the National Grid?
To deliver electricity from power stations
What does the National Grid NOT include?
What does the National Grid NOT include?
Power stations themselves
How does electricity travel through the National Grid?
How does electricity travel through the National Grid?
High voltage and low current
What equation shows power wasted as heat in transmission wires?
What equation shows power wasted as heat in transmission wires?
If the current is halved, what happens to power lost as heat?
If the current is halved, what happens to power lost as heat?
Becomes four times smaller
If current increases by 10 times, how much more energy is lost as heat?
If current increases by 10 times, how much more energy is lost as heat?
100 times more
What voltage do step-up transformers increase electricity to?
What voltage do step-up transformers increase electricity to?
132,000 volts (132kV) or higher
What voltage is electricity reduced to for homes?
What voltage is electricity reduced to for homes?
230 volts
What voltage is used for light industry?
What voltage is used for light industry?
11,000 volts (11kV)
Where are step-up transformers located?
Where are step-up transformers located?
At power stations
When voltage increases, what happens to current for the same power?
When voltage increases, what happens to current for the same power?
Current decreases
What are the three main stages of the National Grid system?
What are the three main stages of the National Grid system?
Generation, transmission, distribution