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Light-dependent resistors (LDRs) are typically made from cadmium sulfide (CdS), a semiconductor material that exhibits changes in resistance in response to changes in light intensity. This unique property allows LDRs to be used in various light-sensing applications.

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When light falls on ldr resistance is increasing why?

When light falls on an LDR (Light Dependent Resistor), more photons are absorbed by the semiconductor material in the LDR, causing more electron-hole pairs to be generated. This increases the conductivity of the material, resulting in a decrease in resistance. Hence, the resistance of an LDR decreases with an increase in light intensity.


What is the symbol for ldr?

The symbol for Light-Dependent Resistor (LDR) is a resistor symbol with photo-sensitive material added to one side. It looks like a regular resistor with one side having a shaded area to represent its light sensitivity.


What happens to the value of an LDR when a bright light shines upon it?

The resistance of an LDR (Light Dependent Resistor) decreases when a bright light shines upon it, causing its conductivity to increase. This change in resistance is due to the light intensity affecting the number of charge carriers in the semiconductor material of the LDR.


What does LDR change as the what intensity changes?

As the light intensity increases, the resistance of an LDR (Light Dependent Resistor) decreases. This means that the LDR becomes more conductive and allows more current to flow through it. Conversely, when the light intensity decreases, the resistance of the LDR increases, reducing the current flowing through it.


What will the decrease of the light intensity on an LDR do to the ammeter reading?

The decrease of light intensity on an LDR will cause the resistance of the LDR to increase, which will result in a decrease in current flow through the circuit. As a result, the ammeter reading will decrease.

Related Questions

Which material is used in LDR?

Cadmium Sulphide (CdS), Cadmium Selenide (CdSe), Selenium, etc.


When light falls on ldr resistance is increasing why?

When light falls on an LDR (Light Dependent Resistor), more photons are absorbed by the semiconductor material in the LDR, causing more electron-hole pairs to be generated. This increases the conductivity of the material, resulting in a decrease in resistance. Hence, the resistance of an LDR decreases with an increase in light intensity.


What is the symbol for ldr?

The symbol for Light-Dependent Resistor (LDR) is a resistor symbol with photo-sensitive material added to one side. It looks like a regular resistor with one side having a shaded area to represent its light sensitivity.


What is the type of ldr commonly used in schools?

automatic


Why LDR used in PIR sensor?

industrial automaton


What happens to the value of an LDR when a bright light shines upon it?

The resistance of an LDR (Light Dependent Resistor) decreases when a bright light shines upon it, causing its conductivity to increase. This change in resistance is due to the light intensity affecting the number of charge carriers in the semiconductor material of the LDR.


What is an LDR symbol?

An LDR is a Light dependent resistor.


Sentence using the word fabricate?

Do not fabricate a story. This is one of many examples for sentence use.


What is the meaning of LDR?

LDR refers to Light Dependent Resistor.


Which logic family is used to fabricate microprocessor?

TTL


Fabricate in a sentence?

You must fabricate the clothing before you can sell it. The machine part was broken, so he had to fabricate a new one. Students can fabricate some interesting stories to use as excuses. The man who committed the crime had no verifiable alibi, and so he began to fabricate a detailed story, one that the police might believe.


How does light affect LDR?

An LDR is a light dependent resistor, which is usually used to detect light levels, either ambient or reflected. The LDR works because incoming light carries energy, which can elevate the energy levels of electrons in a suitable medium to join the 'conduction band' which means that there are more charge carriers in the LDR, and hence the cell has lower resistance.