Two transistors that alternate conducting describe which device?

Two transistors that alternate conducting describe which device?

• A. Monostable Multivibrator
• B. Astable Multivibrator
• C. Bistable Multivibrator
• D. Flip-Flop

Answer: (C)

The situation describes an oscillator behavior where two transistors take turns being on and off. That continuous alternating conduction is the hallmark of an astable multivibrator. In this circuit, there’s no stable state: the feedback between the transistors forces the other one to switch on as one turns off, producing a steady oscillation (a square wave). The timing comes from the RC networks connected between the stages, so changing resistor or capacitor values changes the frequency. If you compare with the other possibilities, a bistable multivibrator has two stable states and acts like a latch that holds its current state until it’s triggered to switch; it does not oscillate on its own. A flip-flop is essentially another term for a bistable latch. A monostable multivibrator produces a single output pulse in response to a trigger and then returns to rest, not a continuous oscillation.

The situation describes an oscillator behavior where two transistors take turns being on and off. That continuous alternating conduction is the hallmark of an astable multivibrator. In this circuit, there’s no stable state: the feedback between the transistors forces the other one to switch on as one turns off, producing a steady oscillation (a square wave). The timing comes from the RC networks connected between the stages, so changing resistor or capacitor values changes the frequency.

If you compare with the other possibilities, a bistable multivibrator has two stable states and acts like a latch that holds its current state until it’s triggered to switch; it does not oscillate on its own. A flip-flop is essentially another term for a bistable latch. A monostable multivibrator produces a single output pulse in response to a trigger and then returns to rest, not a continuous oscillation.