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A liquid is contained in a vertical tube of semicircular cross-section (see figure). The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in the ratio:
1. \(1:1\)
2. \(1:2\)
3. \(\pi:2\)
4. \(2: \pi\)
Subtopic: Â Surface Tension |
 52%
Level 3: 35%-60%
Hints
Air is pushed carefully into a soap bubble of radius \(r\) to double its radius. If the surface tension of the soap solution is \(T,\) then the work done in the process is:
| 1. | \(12\pi r^2T\) | 2. | \(24\pi r^2T \) |
| 3. | \(4\pi r^2T\) | 4. | \(8\pi r^2T\) |
Subtopic: Â Surface Tension |
 64%
Level 2: 60%+
NEET - 2022
Hints
If a soap bubble expands, the pressure inside the bubble:
1. is equal to the atmospheric pressure
2. decreases
3. increases
4. remains the same
1. is equal to the atmospheric pressure
2. decreases
3. increases
4. remains the same
Subtopic: Â Surface Tension |
 70%
Level 2: 60%+
NEET - 2022
Hints
- 1(current)
Q. No.
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