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Physics-

General

Easy

Question

Two very wide parallel glass plates are held vertically at a small separation d, and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, $P subscript 0 end subscript$ = atmospheric pressure, P = pressure of water just below the water surface in the region between the plates–

$P = P_{0} - \frac{2 S}{d}$
$P = P_{0} + \frac{2 S}{d}$
$P = P_{0} - \frac{4 S}{d}$
$P = P_{0} + \frac{4 S}{d}$

The correct answer is: $P equals P subscript 0 end subscript minus fraction numerator 2 S over denominator d end fraction$

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