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Cambridge Secondary (7-9). Stage 7. Science. Learner's Book - Unit 9: Electricity - Question 46

Cambridge Secondary (7-9) · Unit 9: Electricity

Question 46

In this activity, you will draw the scale for ammeters.
Work in pairs.
Draw an ammeter scale and mark the scale with numbers and divisions. The scale should look like one of those in question 2.
Do not add the pointer to the scale.
Write a current beside your ammeter scale. Make sure the current you write is within the scale you have drawn.
Start with a whole number of amps, such as 4 A or 2.0 A.
Swap your drawing with your partner. Your partner will add the pointer to the drawing. The pointer should be in the correct place to match your current.
Swap your drawings back again. Is the pointer in the correct place?
You can progress to decimal numbers, such as 1.7 A. Make sure your drawing has the correct number of divisions between whole numbers.
Swap drawings again and check them as before.
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