term means for the future of electricity generation in Wales.  (ii) Use Figure 1to identify the trends in the generation of electricity using different energy sources between 2009 and 2011. 
GCSE PHYSICS Sample Assessment Materials 43 (iii) In 2011 consumers in Wales used 45000GWh of electrical energy. Describe how the shortfall between supply and demand was met.  (iv) If the new nuclear power station at Wylfa B had been commisioned and used at maximum power in 2011 how much surplus electrical energy would Wales have produced?  (b)Figure 2 shows a general upward trend in the amount of electrical energy generated from renewable sources in Wales between 2004 and 2011, reaching a maximum of 2160GWh in 2011.Figure 2: Electricity generated from renewable sources in Wales, 2004 - 2011 (i) State which renewable energy source didn’t make a contribution to the electrical energy generated in Wales between 2004 and 2011. 
GCSE PHYSICS Sample Assessment Materials 44 (ii) For the period considered (2004-2011) the total amount of electricity generated from renewables in Wales changes considerably. Explain which renewable energy source was mainly responsible for this change.  (c) Since 2011 considerably more Welsh homes have had PV cells installed. Describe and explain how a bar on the chart of Figure 2could look for 2015. 
GCSE PHYSICS Sample Assessment Materials 45 2. The diagram represents a simple electric motor that a pupil investigates in their lesson. The current in the coil flows from Wto Z. This is shown on the diagram. (a) (i) Explain clearly how you would use Flemings left hand rule to determine the direction of the force on the side YZ. 
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