What would be the values of V /I ratios when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively? What conclusion do you draw from these values?
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(i) diagram is attached above
(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
The conclusion is that the resistance is 8/3 Ω
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0.8=2.67
1.2=2.67
1.692=67
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