The detonator is used

by

The detonator is used

as the main mechanism in the bomb
as an optional device to increase the effect of the explosion
to initiate the main charge
to delay the detonation
This question was previously asked in
UPSC CISF-AC-EXE – 2019
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The detonator is used to initiate the main charge in a bomb or explosive device.
Detonators contain a small amount of sensitive primary explosive that, when initiated (e.g., by electrical signal, friction, or shock), creates a shock wave powerful enough to set off the less sensitive but more powerful main explosive charge.
An explosive train typically consists of an initiator (like a blasting cap or electric detonator), an optional booster (which may use a secondary explosive like PETN), and the main charge (which uses a bulk explosive like TNT, RDX, or ANFO). The detonator is the crucial first step in this sequence.

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