I'm new to Arduino and seem to be having a strange situation. I set digital pin 8 on my uno for input, and when I have a wire inserted into it (other end isn't even connected to anything), it's sending a signal when I move the wire.
Is my Arduino defective or is this something that I'm just completely unaware of? The bottom of the Arduino is sitting on a piece of rubber so I know there's nothing below it to conduct to. Like I said, the other end of the wire isn't even attached to anything. Simply wiggling the wire causes it to send a signal as if the bottom is grounding. It does this for any of the inputs I set it to.
So, is this normal or am I just not aware of how inputs actually function?