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41. An L-shaped glass tube is just immersed in flowing water such that its opening is pointing against flowing water. If the speed of water current is v, then

(a)   The water in the tube rises to height v2 /2g

(b)  The water in the tube rises to height  g/2v2

(c)   The water in the tube does not rise at all

(d)  None of these

Answer-a

 

 

(72)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is
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(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

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