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In Course: GCSE Physics (AQA): Paper 1

AQA GCSE Physics: Electrical Power and the National Grid

Covers the calculation of electrical power and energy transferred in circuits and appliances. Explains the structure and function of the National Grid, including the role of step-up and step-down transformers in efficient energy transmission.
A dramatic wide-angle photograph of towering electricity pylons with gleaming high-voltage transmission cables, stretching across a misty British countryside at dawn. The scene captures the vast, interconnected network of the National Grid in a powerful 3:2 landscape frame.

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Deck Contents

25 Cards
Lesson#1
In this deck, we'll explore electrical power and energy. You'll learn how to calculate the power of an appliance and the energy it transfers. We will then look at how this electricity gets to our homes through the vast network known as the National Grid.
Quiz#2
What is electrical power the rate of?

energy transfer

Quiz#3
What is the standard unit of measurement for electrical power?

watts

Lesson#4
There are two key equations for calculating electrical power that you need to know for your GCSE. The first links power to potential difference and current. The equation is: power equals potential difference multiplied by current. So, if you know the voltage across a component and the current flowing through it, you can work out its power.
Quiz#5
To calculate electrical power, what two quantities are multiplied together in the standard equation?

potential difference and current

Lesson#6
The second equation for power links it to current and resistance. This equation is: power equals current squared multiplied by resistance. This is particularly useful for calculating the power lost as heat in a component like a resistor or a long wire.

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