A-Level Physics Specification

OCR A H556

Section 4.3.2: Internal resistance

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#4.3.2a

source of e.m.f.; internal resistance

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#4.3.2b

terminal p.d.; 'lost volts'

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#4.3.2c

(i) the equations \(ε = I(R + r) \) and \(ε = V + Ir \)

(ii) techniques and procedures used to determine the internal resistance of a chemical cell or other source of e.m.f.

PAG4

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