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The given diagrams show four mercury bar...

The given diagrams show four mercury barometers .
(i) If the value of external pressure in cases (i), (ii), (iii) and (iv) is represented by `P_(I), P_(II), P_(III)` and `P_(IV)` respectively, then

A

`P_(I)gtP_(II)=P_(III)gtP_(IV)`

B

`P_(IV)gtP_(II)=P_(III)gtP_(I)`

C

`P_(III)gtP_(II)=P_(IV)gtP_(I)`

D

`P_(I)=P_(II)=P_(III)=P_(IV)`

Text Solution

Verified by Experts

The correct Answer is:
D
The height of the mercury column is same in all the barometers. Therefore, external pressure will be same in all the barometers.
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