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====Explanation====
: The [[Electrical Resistance|resistance]] of an '''LDR''' increases as the [[light]] intensity decreases.
====Obtaining the IV Graph====
{| class="wikitable"
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|[[File:LDRIVGraphCircuit.png|center|300px]]
| style="height:20px; width:300px; text-align:left;" |
#Connect an [[ammeter]] in [[Series Circuit|series]] with the '''LDR''' to measure [[Electrical Current|current]] through the '''LDR'''.
#Connect a [[voltmeter]] in [[Parallel Circuit|parallel]] with the '''LDR''' to measure the [[Potential Difference|potential difference]] across it.
#Use a [[Variable Resistor|variable resistor]] in [[Series Circuit|series]] with the '''LDR''' to vary the [[Potential Difference|potential difference]] across the '''LDR'''.
#Cover the '''LDR''' so that very little light reaches its surface.
#Start with a [[Potential Difference|potential difference]] of zero and increase the [[Potential Difference|potential difference]] by an interval of 0.2V up to 2V.
#Recording the reading on the [[voltmeter]] and [[ammeter]].
#Reverse the connections on the [[battery]] and repeat steps 4 and 5 to find the I-V relationship for negative [[Potential Difference|potential difference]] and [[Electrical Current|current]].
#Repeat steps 5-7 while shining a constant bright [[light]] on the '''LDR'''
|}