Light dependent resistor, Physics

Assignment Help:

 

These resistors change their resistance with variations of incident light energy.

MANUFACTURING:

Cadmium sulphide is obtained in a highly pure state. By adding special materials, it is forms in moulds like disc. It is heated at high temperatures to remove gases. Electrodes are formed by evaporating metal in vacuumed. Leads are connected and put in plastic case with synthetic resins.

SPECIFICATIONS:

R in dark > 10 mega ohms measured after 3 minutes after darks condition.

R in light 100 to 300 ohms at 1000 lax.

Recovery > 200 kilo ohms/sec rise in resistance with in light.

Capacitance < 10pf

Permissible voltage 100 volts peak.

APPLICATIONS: In dark its resistance is high and in light it acts as a conductor. It is used in (1) proximity switches; (2) automatic brightness and contrast control in TV; (3) light failure alarms.

 

 

 

 

 


Related Discussions:- Light dependent resistor

Dot product, Dot Product A Easy demonstration of the relation among the...

Dot Product A Easy demonstration of the relation among the dot product of 2 vectors and the angle among them. Move the slider to view the changes.

What is a mole? , It is the molecular weight of a substance expressed in gr...

It is the molecular weight of a substance expressed in grams ; the basic unit of amount of substance adopted under the Systeme International d''Unites.

Importance of physics, how to write aasignment on importance of physics

how to write aasignment on importance of physics

Illustrate the various modes of vibrations in a closed pipe, Con you descri...

Con you describe harmonics? How are stationary waves formed in a closed pipe? Illustrate the various modes of vibrations in a closed pipe and establish the relation between their f

Electricity, when to identical cells are connected either in series or para...

when to identical cells are connected either in series or parallel across a 2 ohm resistor they send the same current through it calculate the internal resistance of each cell?

Low of succeve disintigration, Dirive an expretion for low of succecive dis...

Dirive an expretion for low of succecive disintigretion

Unit and dimension, A satellite is orbiting around a planet. its velocity i...

A satellite is orbiting around a planet. its velocity is found to depend upon a.)Radius of orbit b.)mass of planet c.)universal gravitational constant(G) Using dimensional analysis

Evaluate the external-internal pressure difference, There is a maximum dept...

There is a maximum depth at which a diver can breathe through snorkel tube because as the depth increases, so does the pressure difference, tending to collapse the diver's lungs. S

Explain concept of doping, Doping: Silicon and Germanium have low value...

Doping: Silicon and Germanium have low values of electrical conductivity because of few free electrons. In order to improve the electrical conductivity of semi conductors' pent

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd