Question

Write a applocation to the principle for broke the cctv camera

Answer 1

Answer:

A security alarm is a system designed to detect intrusion – unauthorized entry – into a building ..... This system employs an electro-magnetic field disturbance principle based on two unshielded (or 'leaky') .... For example, a heat sensor alarm, coupled with a flame detector in the same area is a more reliable indication of an ...