# What is Jhol? (what is a Sag in hindi)

Hello friends, in this article we will know what is a sag? And what are the factors affecting the oscillation? And learn about many facts related to it.

## Sag

If a flexible wire of uniform field area is tied to two suspension points and allowed to hang naturally, it will hang in the form of a curve between those two points. The difference in levels of the support points and the lowest points of the wire is called sag or dip.

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## Factor affecting the sag

The following are the factors that affect the agglomeration –

- Weight W per unit length of the conductor
- span of supports ((span) l
- Tension in the conductor T
- air velocity pressure on the conductor
- driver temperature

If the swing d m, the distance between the snakes (span) l m, the weight W kg per meter per unit length of the conductor and the tension T in the conductor at point O as shown in the figure_{0} kilogram then,

**sag d = Wl²/8T _{0} meter**

load on the driver due to the weight of snow Force, is in the direction of the load of the conductor. Hence, the effective load of the conductor,

**W = W _{C} + W_{i} kg**

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When the wind moves, the wind velocity exerts pressure on the conductor in the horizontal direction. Which is proportional to the projected area of the conductor.

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**Projected area of the conductor = dl square meter**

where d = diameter of the conductor

l = length of conductor

** Pressure W on the conductor by air velocity _{w} = (2/3) dl × W’_{w}**

W’ here_{w} = Pressure per unit area

If snow of thickness t is falling on the driver then

**W _{w} = 2 (d + 2t) l × W’_{w}/3 kg**

To find the swing in the conductor, the effective load of the driver

**W² = (W _{C} + W_{i})² + W²_{w}**

If the direction of action of the effective load on the conductor makes an angle of with the vertical plane, then

**= tan¹{W _{w}/(W_{C} +W_{i},**

Vertical swing = d cos

Horizontal swing = d sinθ

So cosθ = (W)_{C} +W_{i})/W

and sinθ = W_{w}/W

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