What is a real life example of something that provides voltage?

Batteries are one of the most common types of voltage sources in our day-to-day lives. There are many different types of batteries, but they all have one thing in common: A battery uses chemical reactions to generate voltage.

On which factor does resistance depend?

The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.

Where are LDR used in everyday life?

Applications of LDR These devices are used where there is a need to sense the presence and absence of light is necessary. These resistors are used as light sensors and the applications of LDR mainly include alarm clocks, street lights, light intensity meters, burglar alarm circuits.

What are the advantages and disadvantages of LDR?

LDR advantages

High sensitivity (due to the large area it can cover).
Easy employment.
Low cost.
There is no union potential.
High light-dark resistance ratio.

How do you make a LDR circuit?

Components Required:

LDR (Light Dependent Resistor)
BC547 Transistor.
LED.
Battery 9V DC.
Potentiometer (5KΩ)
Resistor (1KΩ)
Connecting Wire.
Breadboard.

What is dark resistance of LDR?

In the dark, their resistance is very high, sometimes up to 1MΩ, but when the LDR sensor is exposed to light, the resistance drops dramatically, even down to a few ohms, depending on the light intensity. LDRs have a sensitivity that varies with the wavelength of the light applied and are nonlinear devices.

What is the resistance of an LDR?

Normally the resistance of an LDR is very high, sometimes as high as 1000 000 ohms, but when they are illuminated with light resistance drops dramatically. The animation opposite shows that when the torch is turned on, the resistance of the LDR falls, allowing current to pass through it.

What is dark resistance of photodiode?

[′därk ri‚zis·təns] (electronics) The resistance of a selenium cell or other photoelectric device in total darkness.