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Question

A ‘U’ - tube containing a liquid is accelerated horizontally with a constant acceleration a0. If the separation between the vertical limbs is l, the difference in the heights of the liquid in the two arms is


A
a0gl
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B
a0lg
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C
gla0
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D
la0g
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Solution

The correct option is B a0lg
If Pa is the atmospheric pressure
‘A’ is the area of cross section
‘h’ is the increase in height
PaA+Aρa0=PaA+(hρg)A
hg=a0l
h=a0lg

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