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Following are the readings of potential ...

Following are the readings of potential and current through a specimen when it is connected to a source of variable potential :
Voltage : `0.2V, 0.4 V, 0.6 V, 0.8V, 1V`
Current : `3mA, 5 mA, 9 mA, 13 mA, 17 mA`
From the observations, the specimen

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