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DO now - Code breaker
DO now - Code breaker
Task 1 - Odd one out
Task 1 - Odd one out
Have a look at the images below and think back to the energy topic.
Which of these images is the odd one out and why?
Task 2 - Electricity production
Task 2 - Electricity production
Go through the presentation below and use it to label the diagram on the companion sheet
Task 3 - The national grid
Task 3 - The national grid
Watch the video and look at the diagrams.
Then answer the questions on the companion sheet
Just for info
Just for info
Transformers increase / decrease PD and current by using the electromagnetic induction. The power in is the same as the power out. By connecting different coils of wire together with an iron core, the power stays the same but the PD and Current can changes.
In this example, the PD is increases as there are more turns of wire on the secondary coil. Using P=IV, if P is constant, increasing V must reduce I. Its this reduction in current that reduces energy loss in the cable
Don't worry, you only get asked about the details in the magnetism topic!
Task 4 - Beat the teacher
Task 4 - Beat the teacher
Find the mistakes in the following information
Find the mistakes in the following information
A step-up transformer reduces the voltage through the transmission cables, which increase the current.
This will make the transfer of electricity more efficient as less energy is lost as light.
Step-low transformers are essential as they reduces the current to a safe working value for consumers.
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