Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

None of these
Increasing the radius of the capillary tube
Increasing the height of water in the vessel
Decreasing the radius of the capillary tube

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Physics
In a conductor

The forbidden energy gap is very wide
The valence band and the conduction band overlap each other
There is no conduction band
The forbidden energy gap is very narrow

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