Statement I: We can measure the potential barrier of a PN junction by putting a sensitive voltmeter across its terminals.
Statement II: The current through the PN-junction is not same in forward and reversed bias.
We cannot measure the potential barrier of a PN -iunction by connecting a sensitive voltmeter across its terminals because in the depletion region, there are no free electrons and holes and in the absence of forward biasing, PN - junction offers infinite resistance'