Physics > AQA QUESTION and MARK SCHEMES > A-level PHYSICS 7408/2 Paper 2 Mark scheme June 2021 Version: 1.0 Final (All)
A-level PHYSICS 7408/2 Paper 2 Mark scheme June 2021 Version: 1.0 Final
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01.1 (Dielectric constant is) permittivity of medium and is equal to 6 permittivity of free space OR The permittivity of the dielectric is 6 times the permittivity of free space Allow: .... ? in a vacuum Its not enough to quote relative permittivity = 6 1 AO1 1a, 01.2 (Electric field exists between plates) Polar molecules align with their positive side facing the negative plate (owtte) 1 producing a counter electric field/reducing the field between the plates 2 The pd V reduces between the capacitor plates but charge Q remains the same so capacitance Q/V increases. 3 1 or vice versa. 3 This mark may be approached from the idea that more charge would be required to maintain pd hence C increases by referencing C = Q/V 3 AO1 1a ×3 ... [Show More]
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