I'm very, very new to EE, so this might be a really basic question. I am trying to make a very basic LED-switch using a bipolar NPN-transistor. The circuit I use can be seen below.
Now, when I prepare this circuit on the breadboard, the LED will dimly emit some light even when the switch is open. When the switch is closed, the LED turns fully on, as desired.
Does anyone know why the LED is on, even though the switch is open?