In a monostable multivibrator circuit, if transistor T1 is in active mode continuously, current will flow through components RC1 and R, assuming a proper voltage rail connection. The circuit will remain stable until a negative input pulse is applied, which charges the input capacitor and turns T1 off, but this transition can only occur once without further input. If the circuit is powered solely by DC without any negative pulse, the current flow dynamics become questionable, particularly with capacitors involved. The discussion suggests that understanding the operation of such circuits can be enhanced through online resources. Overall, the behavior of the circuit hinges on the input conditions and the state of T1.