What is LDR (LIGHT DEPENDENT RESISTOR)

LDR:

LDR is a photo resistor, It work to only light source and when light s increase and LDR resistivity increase .It lights low and resistivity low and LDR is a light dependent resistor. And it is one type resistor. Unit K amper

LDR Material:

Cadmium sulphide(cds)

Lead Sulphide (Pbs) k

USES :

It is a active sensor .

It use automated electronic devices. It use street light,and sun Ray detected solar panel and others.

LDR PHOTO

LDR STUCTURE

LDR two terminal device

Comments

What is Transistors ?

Ans : Transistor is a three layer semiconductor device consisting of either two n- and one p type layers of material. The former is called and n-p-n transistor, and the two p- type and one n type layers of material is called p-n-p transistor. Types of transistors i) Bipolar Junction Transistor (BJT) ii) Unipolar Junction Transistor (UJT)

WHAT IS MCB?

Miniature Circuit Breaker Introduction:- MCB (Miniature Circuit Breaker) is mechanical device operate automatic operation designed to connect and disconnect the electrical circuit in the ordinary and extraordinary situation . Suitable for AC and DC voltage. It means main function is to protected equipment Or circuit from over load and short circuit. The size OF MCB is small and usually use for household and domestic. Average fix ampere rating from 6 Amp up to 125 Amp. It can be reset back to the normal condition after trip but cannot adjust ampere rating. It can be found for single phase and three phase Voltage power supply. Parts of Miniature Circuit Breaker : (1) Actuator piker (for trip and reset) (2) Actuator Device mechanism (3) Main contact (flow of current) (4) Terminal Block (5) Bimetallic steel strip (6) Tripping calibration screw (7) Solenoid coil (8)Arc extinguisher Purpose: Miniature Circuit Breakers or MCB are used to replace fuses that pro -tect individua

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