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

Motion in one dimension , if joe rides his bicycle in a straigght line for ...

if joe rides his bicycle in a straigght line for 15 min with an average velocity of 12.5 km/h south how far has he ridden

Calculate speed of simple harmonic motion, A point is operating simple harm...

A point is operating simple harmonic motion with a time period 2πs. At its mean position its speed is 0.05 m/s. Calculate its speed when it is at a distance of 0.04 m from the mean

What are longitudinal waves, If the particles of a medium vibrate in the di...

If the particles of a medium vibrate in the direction of wave motion the wave is known as longitudinal. a)      It goes in the form of compression and rarefaction. b)      A

Determine same electrons or ion as isoelectronic with co, CO has same elect...

CO has same electrons as or the ion that is isoelectronic with CO is: (1) N + 2                 (b) CN -     (3) O + 2                                (4) O - 2

Define electromotive force, Electromotive force EMF (ξ) - This is the elec...

Electromotive force EMF (ξ) - This is the electrical energy from an ideal battery with no internal resistance.  It is also the open circuit value of a battery (no current is drawn

Ohmmeters, ohmmeters: The use of ohmmeters is somewhat more involved. M...

ohmmeters: The use of ohmmeters is somewhat more involved. Most importantly when measuring resistance the circuit power must be switched off, power is derived from within the i

.ac and dc generator, when we prepare a assignment on this topic what can I...

when we prepare a assignment on this topic what can I do

Find the resistance of copper wire , The specific resistance of copper is 1...

The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f

What is electromagnetic induction, Q What is electromagnetic induction? ...

Q What is electromagnetic induction? The phenomenon of producing an induced emf because of the changes in the magnetic flux associated with a closed circuit is known as electr

Explain the term dielectric constant, Explain the term 'dielectric constant...

Explain the term 'dielectric constant' of a medium in terms of capacitance of a capacitor. Draw a graph showing variation of resistivity of carbon with temperature

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