Physics
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

will overflow
change its meniscus
depressed
will not rise

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Physics
In a bipolar junction transistor

The emitter has the least concentration of impurity
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

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Physics
Superconductors are those elements

Whose resistance falls almost to zero at very low temperatures
Whose conductivity is intermediate between metals and insulators
Which turn into insulators at very low temperatures
Which conduct electricity only at super-high temperatures

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