What are the applications of LDR and microphone?

There are some applications of LDR which are given below. It is used for automatic contrast and brightness control in television receivers. It is used in optical coding. It is used in street light control circuits. It is used in camera light meters.

Which is the application of LDR Mcq?

What is the use of the LDR Sensor? Explanation: An LDR Sensor is used to measure the light intensity of the space surrounding it. Similar variations of these kinds of sensors are used in phones which allow manufacturers to turn off the screen when you place your phone to your ear during a call.

What is the main application of Photoresistor?

Applications of photoresistors Photoresistors are used in streetlights to control when the light should turn on and when the light should turn off. When the surrounding light falls on the photo resistor, it causes the streetlight to turnoff. When there is no light, the photoresistor causes the street light to turn on.

Is counting machine is application of LDR?

In the manufacturing industry, LDR is used as a sensor for the counting of the packets moving on a conveyor belt. 5. LDRs are also used in Light Activated Control Circuits.

What are biosensors Mcq applications?

Biosensors are used in different fields as follows: Defense: To detect mustard gas, nerve gas, etc. Industry: To detect alcohol, acids, phenols, etc. Sports: To determine fatigue by measuring levels of lactic acid, ammonia in perspiration.

Which effect is used in LDR?

At low light levels, the LDR has a high resistance. As the light intensity increases, the resistance decreases. A LDR can be used as a sensor in cameras or automatic lights that come on when it gets dark.

What is the function of the LDR?

Photoresistors, also known as light dependent resistors (LDR), are light sensitive devices most often used to indicate the presence or absence of light, or to measure the light intensity.

Why cadmium sulphide is used in LDR?

Cadmium sulphide is used in the manufacture of photoconductive cells because its spectral response curve closely matches that of the human eye and can even be controlled using a simple torch as a light source.