Physics
A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle ?

Hyper–parabolic
Great circle
Circle
Parabolic

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Physics
In a bipolar junction transistor

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

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