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

What i the name given to that electromagnetic spectrum, What i the name giv...

What i the name given to that kind of electromagnetic spectrum which is used for taking photographs of earth under foggy conditions from great heights?

Calculate the work done, Problem The work done by a force as it acts o...

Problem The work done by a force as it acts on an object equals the force times the displacement times the cosine of the angle between the force and displacement vectors. a

Reducing friction by an air stream, Reducing friction by an air stream ...

Reducing friction by an air stream Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue

Motion in one dimension, Motion of an object in a straight line is known on...

Motion of an object in a straight line is known one dimensional motion. The location of a particle in one dimensional motion can be defined by only one variable (say x). For a pa

Determine the wavelength of the wave, A longitudinal wave with a frequency ...

A longitudinal wave with a frequency of 34 Hz takes 1.0 s to travel the length of a 2.5 m Slinky (see the figure). Determine the wavelength of the wave. λ = ( )m

Plane and the package, Plane and The Package Suppose a plane moving alo...

Plane and The Package Suppose a plane moving along with a constant speed at an elevated height above the Earth's surface. Within the course of its flight, the plane drops a pac

Electromagnatisum, Your friend has gifted an earphone set to you. While mus...

Your friend has gifted an earphone set to you. While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they attract? If yes, why so?

Find total capacity of each container, Containers in Illustrations C and D ...

Containers in Illustrations C and D are identical Each container is 3.25'w x 3.25'w  x 8.4'l Total capacity of each container 88.725 cubic feet Each container is filled wi

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