Physics
Intensity of sound at a point is ____ its distance from the source.

inversely proportional to
directly proportional to square of
directly proportional to
inversely proportional to square of

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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 collector has the least concentration of impurity
The base has the least concentration of impurity
The emitter has the least concentration of impurity

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