Question

Which of the following is not a sensor?
Barometer
Light Dependent Resistor (LDR)
DHT
Relay

Answer 1

What is an LDR (Light Dependent Resistor)? An LDR is a component that has a (variable) resistance that changes with the light intensity that falls upon it. This allows them to be used in light sensing circuits. since ldr is not a sensor

Answer 2

Light Dependent Resistor (LDR)

A Light Dependent Resistor (otherwise called a photoresistor or LDR) is a gadget whose resistivity is an element of the episode electromagnetic radiation. Subsequently, they are light-touchy gadgets. They are likewise called photoconductors, photoconductive cells, or basically photocells. They are comprised of semiconductor materials that have high obstruction. There is a wide range of images used to demonstrate a photoresistor or LDR, one of the most regularly utilized images is displayed in the figure beneath. The bolt shows light falling on it.