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JEE Advanced Model Paper 7 with solutions for online practice

Passage-3

Passage-3A plane pressure pulse, triangular in shape, approaches a rigid wall along normal at a speed of400m/s. At time t = 0, situation is shown in the figure. The peak pressure is 100Pa. The pulse getsreflected by the wall and pressure near the wall gets doubled. Height of the wall is 2 m and width isalso 2m. A detector on the wall records a minimum excess pressure of 16 Pascal.

Question : 13 of 66

Marks: +1, -0

For the first time when will the detector start to record the pressure pulse?

22 × 10−2 s
21 × 10−2 s
31.5 × 10−2 s
20 × 10−2 s

Validate

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