Physics
Which of the following pair is Incorrect?I. Parsec - DistanceII. Barrel - LiquidIII. Light year - Time

All are correct
Only I and III
Only III
Only II

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Physics
In a bipolar junction transistor

All the three regions (the emitter, the base and the collector) have equal concentrations of impurity
The base has the least concentration of impurity
The collector has the least concentration of impurity
The emitter has the least concentration of impurity

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