Capacitors

Today i did 4 different capacitor tests. First i hadto wire up a simple circuit containing a capacitor and a resistor, which would be easy enough to switch capacitors/resistors when i needed to change the test situation. Once this was done i connected it to the oscilliscope and set the oscilliscope for the specific capacitor.

The above picture shows the curve of a capacitor charging. The horizontal axis shows time, each block denotes 10ms. The vertical axis shows voltage, and is pictures in blocks of 5 volts. So, by looking at it, it takes aproximately 50mS to charge up to 12v.
What is interested is that, in the first 10mS, the capacitor is over halfway charged, yet it takes another 40mS to completely charge it.
This is why the equation  RxCx5=T to find the charge time of a capacitor. In this particular image, the calculation was 100(-6)x100x5=50mS. This calculation shows correct with the image on the oscilliscope, and shows that i have used the correct components and they are within their spec.
I then carried out the same test again three more times with different capacitors and resistors.
I found from doing these different tests, that changing the capacitor or the resistor may change the length of time that it takes for the capacitor to charge, but the curve will stay the same. This shows that the nature of charging a capacitor is a constant.