The LDR (Light Dependent Resistor) - A Level Physics

This video introduces and explains the LDR (the Light Dependent Resistor) for A Level Physics.

As the name suggests, an LDR is an electrical component whose resistance is dependent on the light it receives.

Thanks for watching,

Lewis

This video is recommended for anyone studying A Level Physics in the following exam boards:
AQA
CIE
Edexcel
Edexcel IAL
Eduqas
IB
OCR A
OCR B
WJEC

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[Pavsta]

It seems counter intuitive, because when the light intensity increases, the resistance decreases meaning it'll get brighter (same current, higher voltage). But doesn't that mean the light turns on when it's.. light?

[lsjokuz]

Regarding the geometric properties of the resist, is the external area of the resist (the brightness area) the only factor, or does its behavior differ with respect to thickness?

[kingrobert]

What I do not understand is that why when we increase brightness of the diode, it will give off more heat energy, so it will increase resistance. But resistance decreases instead? Please explain,

[lucywest]

is this applicable to AQA a level physics this year ?

[k.b]

Why isnt it directly proportional tho?