Telangana TET Paper 2 Math and Science Model Paper 4

Concept:Surface tension is the force acting per unit length along the edge of a liquid surface, causing it to contract to the smallest area.Explanation:Surface tension is defined as $$\text{Surface Tension} = \frac{\text{Force}}{\text{Length}}$$. The SI unit of force is the newton (N) and the SI unit of length is the meter (m). Dividing force by length gives the unit N/m (newton per meter). Option B ($N/m^2$) is the unit of pressure, option C (N) is the unit of force, and option D (kg·m/s) is the unit of momentum or impulse. Therefore, the correct SI unit for surface tension is Newton per meter.Answer:A. Newton/meter