I would like you to refer to this video for the question
I have a few questions regarding the demonstration
1) Can I use a zinc plate extracted from a heavy duty battery.
2) Can I use conduction instead of induction as shown in video to charge the zinc plate. I will be using a PVC pipe rubbed with a paper towel to transfer negatively charge by contact.
3) Instead of the large ultraviolet source shown in the video, I would be using a small violet light torch shown in the picture, would it also work
(It's violet even though it looks blue, I think it's 430 nm wavelength.)