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During warm weather the cable will expand and sag slightly. If the cable had then been put up too tightly, when the cold weather arrived, the cable would contract and could snap or damage the fastening that clip the cable to the poles.
In other words, the sag is to allow for expansion and contraction of the cables.
What else can I help you with?
Can electric field lines evercross?
no, never.
What are One of the differences between electric and magnetic fields is that electric fields lines always form closed loops?
One key difference between electric and magnetic fields is that electric field lines originate from positive charges and end on negative charges, forming closed loops; whereas, magnetic field lines always form closed loops, never having a starting or ending point.
Do electric field lines cross?
No, electric field lines do not cross each other. If they did, it would imply that there are multiple directions for the electric field at the same point, which is not possible. The electric field lines always repel or attract each other, but they never cross.
What are the rules for electric field lines?
Electric field lines are drawn to represent the direction of the electric field at various points in space. They follow specific rules: they originate from positive charges and terminate on negative charges, they never intersect, the density of lines indicates the strength of the electric field, and they are perpendicular to the surface of a conductor at equilibrium.
What are three facts about electric field lines?
1. Electric field lines of force originate from the positive charge and terminate at the negative charge. 2. Electric field lines of force can never intersect each other. 3. Electric field lines of force are not present inside the conductor, it is because electric field inside the conductor is always zero. 4. Electric field lines of force are always perpendicular to the surface of conductor. 5. Curved electric field lines are always non-uniform in nature.
How can one effectively draw electric field lines?
To effectively draw electric field lines, start by placing positive charges as the source and negative charges as the sink. Draw lines that start at positive charges and end at negative charges, with the lines closer together indicating stronger electric fields. Remember that electric field lines never cross and always point away from positive charges and towards negative charges.
What are the field lines associated with a uniform electric field and how do they behave?
Field lines associated with a uniform electric field are straight and evenly spaced. They point in the direction of the electric field and show the path a positive test charge would follow. The field lines never intersect and are closer together where the field is stronger.
Why is the distance between two lines only defined for parallel lines?
because they never intersect
Difference between tangent and parallel lines?
parallel lines never touch, never get any closer or any further apart. tangent lines touch at one point
What are the deference between parallel lines and intersecting lines?
The difference between intersecting and parallel lines is that, on a graph parallel lines do ont touch,cross or anything. THEY NEVER TOUCH. intersecting lines touch, or cross eachother.\
What is the different between parallel and convergent?
Parallel lines Never Converge
Why do birds never get a shock when they stand on electric wire please answer in Tamil?
They do. but it you probably see them standing on phone land lines
