The pre released material for your G492 gives you big hints as to what will turn up in section C for the paper. Here is some resources to help you understand each part.
Here is a nice summary of how to use a CRO: http://electronicsclub.info/cro.htm
Background on how it works: http://www.schoolphysics.co.uk/age16-19/Electricity%20and%20magnetism/Electrostatics/text/Cathode_ray_oscilloscope/index.html
Bit long but everything you need: http://youtu.be/CzY2abWCVTY
Mostly this will be based on the data they have given you.
Comparison of different cars: http://www.which.co.uk/cars/choosing-a-car/eco-cars/electric-and-eco-cars-guide/
History of electric cars: http://en.wikipedia.org/wiki/History_of_the_electric_vehicle
Battery information: http://en.wikipedia.org/wiki/Electric_vehicle_battery
How the battery is made: http://youtu.be/Mun1Mct6JEs
The experiment written up properly (error analysis is a bit above what we need): http://www.physics.utah.edu/~ewalton/lab_report.pdf
Same idea, more errors: http://www.ic.sunysb.edu/Class/phy122ps/labs/dokuwiki/doku.php?id=phy123summer:lab_1
Bit excitable: http://youtu.be/XjBmzA4w-AA
Remember to get those questions from the student shared drive.