I am just now learning about how transistors work, so please let me know if I have a misunderstanding.
I ran a simulation of the circuit drawn below, and the results were that current flowed only in the bottom loop (with the resistor and switch). When the switch is open, the current flows to the base, thus turning the transistor on (and allowing current to flow through the upper loop with the transistor).
However, my question is: when the switch is closed, why doesn't current flow to the base of the resistor? Can't it pass through the base and through the right side emitter (in NPN transistor), thus creating a sort of a "parallel" circuit? Again, please forgive me if I have a misconception, and share your knowledge! :)