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Select the correct statements :
            I) The drift velocity of electrons in a metallic wire is very high.
            II) Voltage is not proportional to current in the case of non-ohmic devices
            III) Voltage is equal to product of resistance and current

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I and II correct

II and III are correct

Only III is correct

All are correct

answer is B.

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Detailed Solution

Voltage is not proportional to current in the case of non-ohmic devices.

Voltage is equal to product of resistance and current

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Select the correct statements : I) The drift velocity of electrons in a metallic wire is very high. II) Voltage is not proportional to current in the case of non-ohmic devices III) Voltage is equal to product of resistance and current