3. Results

Table 2: Results of the experiment

Metals	Time / minutes	e.m.f. / V (labquest) (Test 1)	e.m.f. / V (sanwa) (Test 1)	e.m.f. / V (labquest) (test 2)	e.m.f. / V (sanwa) (Test 2)	Vavg / V	V error / V
Copper + Zinc	0	0.081	1.078	0.081	--	0.081	0.027
	5	1.077	1.075	0.091	1.093	0.754	0.251
	10	1.076	1.075	1.109	1.096	1.094	0.365
	15	1.076	1.075	1.093	1.092	1.087	0.362
	20	1.073	1.077	1.092	1.091	1.085	0.362
	25	1.069	1.064	1.087	1.093	1.083	0.361
	30	1.076	1.075	1.091	1.091	1.086	0.362
Copper + Aluminium	0	0.514	--	0.555	--	0.535	0.178
	5	0.492	0.497	0.555	0.561	0.526	0.175
	10	0.523	0.507	0.599	0.600	0.557	0.186
	15	0.492	0.506	0.521	0.560	0.520	0.173
	20	0.516	0.506	0.609	0.499	0.533	0.178
	25	0.523	0.524	0.585	0.592	0.556	0.185
	30	0.540	0.538	0.587	0.586	0.563	0.188
Zinc + Aluminium	0	0.692	--	0.516	--	0.604	0.201
	5	0.692	0.684	0.484	0.493	0.588	0.196
	10	0.720	0.692	0.530	0.520	0.616	0.205
	15	0.537	0.561	0.526	0.526	0.538	0.179
	20	0.548	0.583	0.500	0.505	0.534	0.178
	25	0.552	0.560	0.475	0.476	0.516	0.172
	30	0.533	0.532	0.401	0.416	0.471	0.157

Graphs

Graph 3: Histogram of all the voltages produced per pair of metal 

Graph 4: Graph of the voltages produced in all the pair of metals