Experiment to show that current leads voltage by 90° in capacitor (Using Oscilloscope)

[Edward Yuen]

Hi,

Many books told us that current leads voltage by 90 degrees in capacitor. 

So,  I designed a simple experiment to show that it is true.

Here is my experiment :  https://www.youtube.com/watch?v=wjQsyLv0X7A&t=15s