SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one is a LDR?
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It senses Light. The brighter the light the lower the resistance.
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It senses Temperature. The hotter the temperature the lower the resistance.
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Values of the resistance of the LDR may change over many orders of magnitude the value of the resistance falling as the level of light increases. It is not uncommon for the values of resistance of an LDR or photoresistor to be several megohms in darkness and then to fall to a few hundred ohms in bright light.
Detailed explanation-2: -What is an LDR (Light Dependent Resistor)? An LDR is a component that has a (variable) resistance that changes with the light intensity that falls upon it. This allows them to be used in light sensing circuits.
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