For the arrangement shown in figure, initially the balance `A`and `B` reads `F_(1)` and `F_(2)` respectively and `F_(1)gtF_(2)`. Finally when the block is immersed in the liquid then the readings of balance `A` and `B` are `f_(1)` and `f_(2)` respectively. Indentify the statement which is not always (where, F is some force ) correct statement.
.

Options

A. `f_(1)gtf_(2)`
B. `F_(1)+FgtF_(2)+F`
C. `f_(1)+f_(2)=F_(1)+F_(2)`
D. None of these

Answer

A

Explanation

`F_(1)` will decrease and `F_(2)` will increase. So, `f_(1)` may or may not be grater than `f_(2)`.
total weight to system in both conditions will remain same. Hence,
`f_(1)+f_(2)=F_(1)+F_(2)`.