Uploaded April 2024 | Updated September 2026, 2 weeks ago

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Here is a an extremely common mistake in A Level Physics. The mistake is on the application of internal resistance to a circuit with an LDR and is a portion of the circuits component in A Level Physics. This is applicable to AQA A Level Physics, OCR A and B , Edexcel, CIE, IB and many similar courses such as AP Physics.
In this circuit, the current increases and the p.d. decreases which presented "big gaps" in knowledge according to some examiners reports.