Monostable (one-shot) multivibrator concept: A one-shot circuit is also known as a timer because a trigger produces a single pulse of defined width. Evaluate the statement.

Introduction / Context:
A one-shot, formally called a monostable multivibrator, is fundamental in digital timing. When triggered, it produces one output pulse whose width is set by external components or internal timing, so many practitioners casually call it a timer. This question asks you to judge that naming and understand why it is reasonable.

Given Data / Assumptions:

• A one-shot (monostable) has one stable state and one quasi-stable state.
• On a trigger edge, the output moves to the quasi-stable state for a defined duration (pulse width), then returns to the stable state.
• Timing is set by RC components or internal references in IC one-shots.

Concept / Approach:
The essence of a timer is to create a time interval. A one-shot does exactly that on demand: it generates a pulse with width t_w determined by design parameters (e.g., t_w = k * R * C for many devices). That pulse can debounce inputs, stretch narrow edges, create delays, or gate logic for a known time.

Step-by-Step Solution:

Verification / Alternative check:
Datasheets for classic one-shot ICs (e.g., 74121/74123/4538) specify equations for pulse width vs. R and C, underscoring the timing role.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing monostable (one-shot) with astable (free-running clock) or bistable (flip-flop/latch). Assuming “timer” means only a 555-type oscillator; it also covers triggered timing intervals.

Final Answer:
Correct