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

Doppler effect, #quest. Imagine a small observer is positioned in front of ...

#quest. Imagine a small observer is positioned in front of the cork in your picture above. As the cork approaches, the observer measures the wavelength of the waves passing by. How

Explain doppler effect, Whenever there is a relative speed among a source o...

Whenever there is a relative speed among a source of sound and the listener, the apparent frequency of sound listen by the listener is dissimilar from the real frequency of sound e

Define hole in wall (princeton), Define Hole in Wall (Princeton)? A con...

Define Hole in Wall (Princeton)? A container is separated into two parts I and II by a partition with a small hole of diameter d Helium gas in the two parts is held at temper

Whomehole, What is whomehole and how it

What is whomehole and how it

1, what is majority and minority charge carrier ?

what is majority and minority charge carrier ?

Self Gravitational PE, Self Gravitational Potential Energy of matter formin...

Self Gravitational Potential Energy of matter forming a thin uniform shell of mass M and radius R is-

Experiment of spring balance for heavier loads, Spring balance for heavier ...

Spring balance for heavier loads Fasten a chair or automobile cushion spring to a flat piece of wood that will dish up as base to the instrument. As scale pan, use a large tin

Displacement of a small distance, how to use instruments like Vernier calip...

how to use instruments like Vernier calipers and micro screw gauge to measure round objects

Total radiance emittance for the blackbody, For a blackbody, the frequency ...

For a blackbody, the frequency at which maximum energy is emitted is 3 x 10 13 Hz: A. Give a wavenumber for the wavelength of the infrared emission? B. What is the tempe

Which series describes electron transition for hydrogen atom, For the hydro...

For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the: a)  Lyman series b)  Balmer series

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