Physics
Which one of the following is not a feature of Indifference Curve?

They are parallel to each other
They slope downwards to the right
They do not intersect each other
They are concave to each other

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

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