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Unit - 5.3 Thermal Expansion And its Applications — PHYSICS STD 7 — Question

ICSE BoardEnglish MediumSTD 7PHYSICSUnit - 5.3 Thermal Expansion And its Applications2 Marks
Question
Describe principle and function of fire alarm.
✓

Answer

A fire alarm is a unit made of several devices, which uses visual and audio signalization to warn people about a possible fire, smoke, or carbon monoxide occurrence in the area of coverage. Fire alarms are usually set in fire alarm systems to provide zonal coverage for residences and commercial buildings.

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