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A student makes a 'component tester' - OCR Gateway - GCSE Physics Combined Science - Question 11 - 2019 - Paper 1
Question 11
A student makes a 'component tester'. He connects a diode to a small filament lamp. This is a diagram of the component tester. A B (a) Describe how the student c... show full transcript
Worked Solution & Example Answer:A student makes a 'component tester' - OCR Gateway - GCSE Physics Combined Science - Question 11 - 2019 - Paper 1
Step 1
Describe how the student could use the component tester to find the positive (+) terminal of a cell.
Answer
To determine the positive terminal of a cell using the component tester, the student should follow these steps:
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Connect the diode correctly: The student should ensure that the diode is connected in such a way that its anode (the positive side) is connected to terminal A of the component tester, and the cathode (the negative side) is connected to terminal B.
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Attach the cell: The student should then connect the cell's terminals to the A and B terminals of the component tester. It does not matter which terminal of the cell is connected to which terminal of the tester at this point.
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Observe the lamp: Finally, the student should observe the filament lamp. If the lamp lights up, it indicates that the connection is correct and terminal A is the positive terminal of the cell. If the lamp does not light, then terminal B must be the positive terminal, and terminal A would be the negative terminal.