Light dependent resistor, Physics

 

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.

 

 

 

 

 

Posted Date: 7/9/2012 5:40:55 AM | Location : United States







Related Discussions:- Light dependent resistor, Assignment Help, Ask Question on Light dependent resistor, Get Answer, Expert's Help, Light dependent resistor Discussions

Write discussion on Light dependent resistor
Your posts are moderated
Related Questions
working model needed.........please help!!!!!!!!!!!!

Derive the relation Relationship  between  α and  β: Beta  factor  (β)  is  the  current  gain  factor  of  a common emitter circuit is defined as ratio of change in coll

A reversible power cycle receives energy H Q from a reservoir at temperature H T and rejects C Q to a reservoir at temperature C T. The work developed by the power cycle is used to

a magnatic train

A two farad and a four farad capacitor are connected in series. What single capacitance is "equivalent" to this combination? A 2-farad and a 4-farad capacitor are connected in

describe the cnstruction of optical fiber

Calculate the heat required to melt 316.7kg of potassium metal at 336 K.   The enthalpy of fusion of potassium is 2.35 kJ mol -1 .

a projectile is fired from a gun has an initial velocity of 90.0 Km/h at an angle of 60.0 degrees to the horizontal. When the projectile is at top of its trajectory an internal exp

Calculate the moment of inertia of An 8.00-kg cylinder, of length 19.5cm and diameter 12.0 cm,about the central axis of the cylinder,if the cylinder is (1) thin-walled and hollow,

what is light