The pressure due to a thrust of 1 N on a unit metre square area is
A
1 bar
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B
1 atm
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C
1 Pa
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D
1 J
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Solution
The correct option is C 1 Pa 1 N of thrust acting on a unit metre square area, results in a pressure of 1N m−2 or 1Pa. The units of atm and bar are higher units of pressure, and joule (J) is not a unit of pressure, but of energy or work done.