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Torricelli's barometer uses a tube of mercury inverted into a trough. At sea level the column stands about:
A76 cm high
B7.6 cm high
C760 cm high
D1 metre high
Answer & Solution
Correct answer: A. 76 cm high
1. The mercury column balances the air pressure.
2. At sea level that is one atmosphere.
3. The column is about 76 cm.
_Source: NCERT Class 11 Physics Part II, Chapter 10, Mechanical Properties of Fluids._
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