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June 2011
1(a)the mains live wire is brown 1(d)…and give the unit. power in Watts(W) / kiloWatts(kW) 2(a)work done=force applied x distance moved just use the equation; note that force is applied along the slope, not straight up 4 marks
3 The whole question tests basic revision. (a)simple atomic structure (b)an atom is neutral because number of protons=number of electrons (c)isotopes have variable number of neutrons (d)an ion has gained or lost electron(s) 5 marks
5(a)on a velocity/time graph, the distance travelled is equal to the area under the line 6(a)(i)basic revision:circuit symbols ammeters in series and voltmeters in parallel with the component being tested 6(a)(ii)AC means current reverses direction 6(b)(i)rearrange before use: R=V/I 6(b)(iii)stretched so must be elastic strain energy 8 marks
7(a)rearrange before use: a=F/m Use resultant force in equation 3 marks
These are not all the marks available, but nobody doing Higher tier should have missed many of these twenty. Some marks were gained by recall, some by knowing what to do in the exam. Now total the marks that you missed – how would they have boosted your grade?
A*33 A30 B24 C18 D16