I'm learning about transistors and am trying to make a basic circuit that uses a photoresistor as a sensor to turn an LED on and off depending on light conditions (the 150kOhm resistor is where the photoresistor will be). I'm still trying to learn how to choose the appropriate resistor values, but messing around in Multisim I noticed that the voltage divider in the circuit below does not behave as I expected.
Here's the circuit with the top resistor in the voltage divider being 1kOhm:
According to Multisim, the voltage across each of the resistors is about the same, when almost the entire supply voltage should be across the bottom resistor since it's much larger than the top.
Here's the circuit with the 1k resistor changed to a 10k:
If I take the transistor out of the circuit, then the voltage divider behaves as it should.
Why isn't the voltage divider working properly when the transistor is attached to it?