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The resistance of LDR increases when light is not available (or is limited). And the resistance drops when Light is abundant.
This principle can be used in proximity detectors where one or more light source(s) is/are active. When a person / object comes in proximity of the source, the light gets reflected from the object-surface & can now be received by LDR. So due to proximity of the object, resistance of LDR changes - this can be used to trigger different actions like open the door, trigger a motor. Fire an alarm. etc.
Resistance of LDR varies according to intensity of incident light over it,It is used in street light to detect day/night and turn on/off the street light automatically
What else can I help you with?
In technology what does LDR stand for?
LDR stands for Light Dependent Resistor. It is a type of resistor that changes its resistance based on the amount of light that falls on it. This change in resistance allows LDRs to be used in light-sensitive applications, such as automatic lighting controls.
Who invented the light dependent resistor?
J.B. Gunn is credited with the invention of the light dependent resistor in the early 20th century. It was initially developed for military applications during World War II.
What are the independent dependent and control variables in series circuit containing 1ammeter a resistor a light bilulb and 3cells?
Independent variable: the number of cells in the circuit. Dependent variable: the current measured by the ammeter. Control variable: resistance of the resistor, type of light bulb.
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 a use of a ldr?
A Light Dependent Resistor (LDR) is used in various applications to detect the presence or absence of light. It is commonly used in automatic lighting systems, camera exposure controls, and streetlights to adjust the intensity of light based on the surrounding conditions.
How do you set the sensitivity of a light dependent resistor?
using a variable resistor we can adjust the sensitivity of a light dependent resistor
Is Light dependent resistor an example of resistor?
yes, a variable resistor
What is an LDR symbol?
An LDR is a Light dependent resistor.
Who invented light dependent resistor?
K. K.
What is the function of an LDR or a TDR in an circuit?
The function of an LDR or light dependent resistor is to change the brightness of the light based weather conditions or light hitting the object the LDR is on. When it is darker out, the light does not shine as brightly.
In technology what does LDR stand for?
LDR stands for Light Dependent Resistor. It is a type of resistor that changes its resistance based on the amount of light that falls on it. This change in resistance allows LDRs to be used in light-sensitive applications, such as automatic lighting controls.
What are the advantages and disadvantages of light dependent resistor?
itroduction on LDR
What is the meaning of LDR?
LDR refers to Light Dependent Resistor.
Who invented the light dependent resistor?
J.B. Gunn is credited with the invention of the light dependent resistor in the early 20th century. It was initially developed for military applications during World War II.
Materials required to study light dependent resistors?
a resistor , two multimeter ,
What is a light dependent resister?
As light falls on the conductor then emission of electrons would increase the conductivity and so its resistivity decreases. Such a conductor is known as light dependent resistor.
Where are light dependent resistors used for?
Its slows down energy when it passes thought the light depntent resistor.
