My setup is simple: a NPN transistor is connected to a DC motor and a battery. The series goes like this: positive terminal - motor - collector; emitter - negative terminal. The transistor base is a loose, long wire.
I would assume that shorting the base and collector would turn the transistor into a diode, allowing current to pass. However, this does not happen. Instead, shorting the base and emitter makes the motor turn. Is it possible that this is not a NPN transistor and some other type instead? Or am I mistaken somewhere else?