Question

Passive and omnidirectional sensor is a. Temperature b. Water-level c. Soil moisture d. All of the above

Answer 1

d. All of the above

passive sensor. A passive sensor is a device that detects and responds to some type of input from the physical environment. Passive sensor technologies gather target data through the detection of vibrations, light, radiation, heat or other phenomena occurring in the subject's environment.

Answer 2

Answer: (d) All of the above

Explanation:

The natural phenomenon is measured as passive and omnidirectional sensors. These phenomena include temperature, soil moisture, water level, etc. The passive devices are used to measure the natural phenomenon only.

The technology and the method used by passive devices differ from that of the active devices. The active devices use the wavelengths of the thing as a sensor, whereas in passive devices, such is not the case. Passive devices are based on the vibrations from the natural environment.