Hi i bought some MOSFETs IRFP2907 to be specific and i get some weird behavior from them. I have been testing them by connecting the drain to the positive side of a 9V battery and the source via a led and a 1K resistor to the negative. the LED lights up no matter what i connect the gate to, even if i leave it disconnected. this also works if i connect it the other way, source -> drain instead. is the MOSFET broken? i bought 2 of them and both display the same behavior.
The thing that bothers me is that if i touch the gate with a wire connected to the positive end of the battery it will stay "on" even after i remove the connection. it can only be turned of by touching it with a wire connected to the negative end. shouldnt it turn of as soon as there is no connection at the gate? i have tried running this in a circuit simulator i found online here is the circuit i have and it confirms that it should not have this weird memory effect.
any explanations/help? is the MOSFET i chose not a n-type? and would that even cause this?