Question

A wooden piece is balanced by a brass weight in a sensitive balance. Now the pan contained by wooden piece is covered by a bell jar and then evacuated;

• A. the pan containing the wooden piece will go up
• B. the pan containing the wooden piece will go down
• C. the beam will remain horizontal
• D. nothing can be said definitely

Answer 1

The correct option is C the beam will remain horizontal

A wooden piece is balanced by a brass weight in a sensitive balance. Now the pan contained by wooden piece is covered by a bell jar and then evacuated the beam will remain horizontal.

so the correct option is C.