Water rises to height `h` in capillary tube. If the length of capillary tube above the surface of water is made less than `h` then

Options

A. water does not rise at all.
B. water rises up to the tip of capillary tube and then starts overflowing like a fountain.
C. water rises up to the top of capillary tube and stays there without overflowing.
D. water rises up to a point a little below the top and stays there.

Explanation

To solve the problem regarding the behavior of water in a capillary tube when the length of the tube above the water surface is made less than the height `h`, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Capillary Action**:
- Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of external forces. It occurs due to the adhesive forces between the liquid and the walls of the tube, as well as the cohesive forces within the liquid itself.

2. **Initial Condition**:
- Initially, water rises to a height `h` in the capillary tube due to capillary action. This height `h` is determined by the balance of cohesive and adhesive forces, as well as the radius of the tube and the density of the liquid.

3. **Changing the Length of the Tube**:
- When the length of the capillary tube above the water surface is reduced to less than `h`, we need to analyze how this affects the water column in the tube.

4. **Effect of Reduced Length**:
- If the length of the tube above the water surface is less than `h`, the water column will still be supported by the adhesive forces acting at the surface of the water. However, the height of the water column cannot exceed the height `h` that is determined by the capillary action.

5. **Equilibrium State**:
- As long as the capillary tube is open to the atmosphere and the height of the tube above the water surface is less than `h`, the water will remain at the height `h`. The water will not rise further since it has reached its maximum height due to capillary action.

6. **Conclusion**:
- Therefore, if the length of the capillary tube above the surface of the water is made less than `h`, the water will remain at height `h` in the tube. The water will not overflow or drop below this height as long as the tube remains open to the atmosphere.

### Final Statement:
In conclusion, reducing the height of the capillary tube above the water surface to less than `h` will not change the height of the water column in the tube; it will remain at height `h`.