Q.

The work done by pressure in forcing 2m3  of water through a pipe of radius 1 cm, if the pressure difference across a pipe is 105Pa  is

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a

3×106J

b

2×105J

c

4×106J

d

0.2×103J

answer is B.

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Detailed Solution

dw=pdv=105×2 =2×105J
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