Why does the light bulb's brightness decrease?
So I have a circuit in the picture with three resistors.
If I were to remove/disconnect $R_2$ from the circuit, what would happen to the overall brightness of $R_3$ and $R_1$?
Now the answer I already have is that $R_1$'s brightness will go down and $R_3$ will go up.
I understand that $R_1$'s brightness goes down because by removing the $R_2$, the net resistance goes up (destroying a parallel combination)
But I don't understand why $R_3$ would go up? Conceptually this makes no sense to me. How do I know that the new current would always be larger than when the current splits at the junction?
I would like a conceptual physics answer and not equations comparing inequalities.