[Solved] Sensitivity of a level tube increases with a. An increase i (2024)

Concept:

The sensitivity of a level tube is the angle in seconds subtended at the centre by an arc of the level tube equal to one division of the tube.

The sensitivity of a bubble tube can be increased by –

1. Increasing the length of the level tube
2. Increasing the diameter of the tube
3. Increasing the internal radius of the level tube
4. Decreasing the viscosity of the liquid used in the tube
5. Decreasing the roughness of the walls of the level tube

Hence, The sensitivityof a level tube increases with an increase in the radius of curvatureof the bubble tube and The smoothnessof the finish of the inner surface of the bubble tube.

Sensitivity of bubble tube,\(\alpha = \frac{S}{{nD}} \times 206265\;seconds\)

Where, s = staff intercept

n = no of divisions of bubble deviated

D = distance between staff and instrument station