When I'm doing a simple half-wave rectifier with the set-up as shown above (Note: Diode D2 is not connected) and connect terminal 5 and 4 with the positive and negative terminals of the oscilloscope, this is what I get:
Instead of getting a horizontal line in the second half cycle as the diode blocks the current flow in the opposite direction, I get a slanted line with a positive gradient.
Can someone give me an explanation on why this happens in my experiment? I have only some basic knowledge about electronics and I'm unable to come up with a plausible explanation.
This is what I get when I connect the oscilloscope to terminal 1 and 2, in case it helps:
Edit: I uploaded the wrong picture for the my third one. I have uploaded the new picture.