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Measuring Internal Resistance - PRACTICAL - A Level Physics

In this video I go through an AQA Physics A Level Required Practical that uses an electrical circuit experiment to measure the internal resistance of a cell or battery. (This is AQA Required Practical 6.) This is also the OCR A Level Physics PAG 3.3 Practical. Internal resistance is the electrical resistance within the cell or battery that is powering the circuit. Measuring internal resistance can be done by changing the external resistance of the circuit and recording the terminal p.d of the cell. When a graph is plotted the gradient is the negative value of 'r' while the y-intercept should be equal to the e.m.f. of the cell. See instructions for all the practicals at http://www.alevelphysicsonline.com/ye... Thanks for watching, Lewis _____________________________________ MY PHYSICS WEBSITES Find even more videos organised by exam board and topic at: GCSE Physics Online ► https://www.gcsephysicsonline.com A Level Physics Online ► https://www.alevelphysicsonline.com MY YOUTUBE CHANNEL Your support in watching this video has been invaluable! To contribute towards the free videos on YouTube, make a small donation at: ► https://www.paypal.me/physicsonline FOLLOW ME ► https://www.youtube.com/physicsonline... ►   / physicsonline   ►   / gcseandalevelphysicsonline   #resistance #alevelphysics #physicsonline