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Pressure change will be minimum at both ends. In fact, pressure variation is maximum at l/2 because the displacement node is pressure antinode.

1. Pressure is maximum at l/2
2. Pressure is minimum at both ends
3. Displacement node is pressure antinode
4. Pressure variation is maximum at l/2

Correct answer: Pressure variation is maximum at l/2

Solution

In a standing wave, pressure variation is maximum at the pressure antinode, which corresponds to the displacement node. This occurs at the midpoint (l/2) of the wave.

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