ahaaa, your back. *:Evil: muwahaha* let us begin:
*ahem*Bismillah....
Right, well basically:
*clears throat*
Get some emmm..sasauge or ANYTHING you wish to experiment with. And, just attach it all to a circuit

this circuit should have a ammeter and a voltmeter...so when you've got the reading for volts and amps. You can do some GENIUS calculations *I will help you.inshAllah*...and hey presto...you can work out resistance.
NOW....the Physics examiner who was bored one day decided to use sasauge but you can use whatever you wish.
Check with your teacher first!!!!
Remember you have to be ACCURATE and FAIR in your experiment.So, you must think it through-thoroughly
You don't have to use food, you could use....various wires.
An experiment to find the resistance of various wires (i.s: copper,aluminium etc).
please please ask your teacher before DECIDING on what you wish to do for your experiment!!! <<<I cannot elaborate