Physics
Which of the following instruments is used to measure humidity ?

Anemometer
Kata Thermometer
Sling Psychrometer
Clinical Thermometer

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Physics
In a bipolar junction transistor

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

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