State any two applications of LDR. 

2 Answers

Answer :

LDR are used in alarm clocks. LDR are used in street lights. LDR are used in light intensity meters. LDR are used in burglar alarm. LDR are used in light sensors

Answer :

i) In camera for exposure control ii) In photocopy machine iii) In security alarms iv) As smoke detector v) In street light control 

Related questions

Description : List two applications of LDR.

Last Answer : 1. It is used for automatic contrast of brightness control in television receivers. 2. It is used as a proximity switch. 3. It is used in the street light control circuits. 4. It is used in the ... security alarms. 9. It is used in the smoke detectors. 10. It is used in the infrared astronomy.

Description : What are the things required to make an LDR circuit to run four motors?

Last Answer : This is a circuit in which a motor will turn on and spin when there is adequate light in the ambient environment. As soon as ambient light is sensed by the circuit, the motor will automatically turn on and remain on as long as the light remains.

Description : Does LDR works?

Last Answer : What do you mean by LDR? As the question is under category love and relationships I am assuming it as long distance relationship. Is it that what you mean by LDR? If so I think distance is not a ... or genuine relationship. It will work well as good as or may be better than a love at next door

Description : Devices which convert various physical quantities into electrical voltage are known as (a) Control system (b) sensors (c) level sensors (d) LDR

Last Answer : (b) sensors

Description : A sensor which changes light intensity into electric voltage. (a) LDR (b) thermistor (c) photodiode (d) photovoltaic

Last Answer : (a) LDR

Description : With help of constructional diagram, explain working of LDR.

Last Answer : Working of LDR: Due to the radiant energy supplied to the semiconductor, the covalent bonds are broken and the electron hole pairs are generated resulting into flow of current. These increased ... resistance of the LDR will decrease with increase in the intensity of incident light.

Description : With the help of constructional diagram, explain the working of LDR with neat sketch.

Last Answer : Working Principle The resistance depends on the intensity of light, as resistance decreases with increase in light intensity. Characteristics Applications of LDR 1. They are often ... circuits, light intensity meters, for counting the packages moving on a conveyor belt, etc.

Description : Draw & describe construction of LDR

Last Answer : Description: 1. Photo resistors (or LDR) are manufactured from photo-conductive semiconductor materials such as cadmium sulphide (CdS), cadmium selenide (CdSe) and lead sulphide (PbS). 2 ... of photo resistors may be several mega ohms in total darkness and less than100Ω, when well illuminated.

Description : Draw symbol and characteristic of LDR. Give material used for it.

Last Answer : Symbol of LDR: - ➢ Material used for LDR 1. Light Dependent Resistor (LDR) is made from a piece of exposed semiconductor material such as cadmium sulphide. 2. Materials used ... include, lead sulphide (PbS), lead selenide (PbSe), indium antimonide (InSb) which detect light in the