A time bomb is characterized by which triggering mechanism?

A time bomb is characterized by a timer mechanism, which is designed to detonate at a preset time. This type of triggering mechanism allows the person who constructed the bomb to set the explosion for a specific time or date, creating a delay between the planting of the device and its activation. The timer can be analog or digital, often calibrated to count down to zero, at which point the explosive device is triggered.

The use of a timer distinguishes time bombs from other types of explosive devices. For example, manual activation requires direct involvement from the person to initiate the explosion, while remote control allows for detonation from a distance. Pressure-sensitive mechanisms function based on physical pressure being applied, which activates the device immediately upon such pressure, rather than using a predetermined time frame. Thus, the timer mechanism is the most fitting characteristic for identifying a time bomb.