Attempt any SIX :
What is capillarity ? Give any 'two' applications of capillarity .

Explanation

### Step-by-Step Solution:

**Step 1: Define Capillarity**
Capillarity, also known as capillary action, is the phenomenon where a liquid rises or falls in a narrow space, such as a capillary tube, due to the forces of surface tension and adhesion. When a tube is inserted into a liquid, the liquid either rises or falls depending on the balance between cohesive forces (forces between like molecules) and adhesive forces (forces between unlike molecules).

**Step 2: Explain the Mechanism of Capillarity**
The height to which the liquid rises or falls in the capillary tube can be described by the formula:
\[ h = \frac{2T \cos \theta}{r \rho g} \]
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