An electric curcuit consisting of a 0.5m long nichrome wire XY, an ammeter, a voltmeter, four cells , four cells of 1.5V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
(ii) What is the resistance of the wire.
(iii) Following graph was plotted between V and I values:
What would be the values of V/I ratios when the potential difference is 0.8V, 1.2V and 1.6V respectively? what conclusion do you draw from these values?
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