Unfortunately, you got them backwards in both cases.
Remember reduction (increase in number of electrons) occurs at the cathode while oxidation occurs at the anode. So check which of the elements is more electropositive. That element will form your anode. The periodic table will help you.
In response, to question 1,
1. As your intensity of light increases, the NUMBER of photons hitting the surface of your material will increase. Thus, the number of electrons emitted will increase, and, as you have said, increase the current.
2. Keeping mind the presence of the threshold...
Hi,
Thank you all for your help. Jim, I was thinking of trying to find the charge on the piezoelectric crystal too! I am searching our lab for a capacitor that can carry the required charge now. I will definitely let you know the results of my experiment.
Thanks again
Hi dlgoff,
Thanks a lot for the help. I did not think of that. I think I will modify the apparatus I am using so that I can load a mass on it and then measure a steady voltage. Would I be right in assuming that I would get a straight line for the voltage-time graph then...
Hi,
I am doing my Extended Essay in Physics(so yeah, I am doing the IB). I am really interested in taking up electrical engineering at university, and so, I had done an EE in piezoelectricity. I have taken the crystal from a barbecue lighter and connected it to a vernier( a machine that can...