Question

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Answer 1

ratio at 0.8V = 8/3; ratio at 1.2V = 8/3; ratio at 1.6V = 8/3

(i) diagram is attached below

(ii)

at potential diff 0.8V, V/I = 0.8/0.3 = 8/3

at potential diff 1.2V, V/I = 1.2/0.45 = 8/3

at potential diff 1.6V, V/I = 1.6/0.6 = 8/3

This shows that the ratio V/I is constant and ohm's law is obeyed

(iii) the resistance is 8/3 Ω

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