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Why telegraphs and electrical lines are never hung tautly between poles?
Wiki User
∙ 13y ago
Wires in outside environment are subject of weather conditions, particularly extreme heat and cold variations. Material which wires are made of contracts and expands depending on temperature and therefore a safe margin is needed, so after contraction wires wouldn't snap.
Wiki User
∙ 15y ago
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What holds up power lines?
Electrical transmission towers are what holds power lines up. These towers are made of steel and have an openwork lattice design.
Why are there sometimes balls on high voltage electrical wires?
The balls on some power lines are required so that airplane pilots will be able to avoid flying into the lines.
Lines running between the two poles are called as?
Lines running between two poles are called Semicircles
What are the lines in between centimeters?
millimeters
How does the lines if longitude look?
Peel an orange. The lines between the sections of the orange are similar to the pattern of longitude lines on the globe.
When did electricity start to be used?
Electricity started to be used in 1816. During the 1840s when electrical telegraphs were being used electrical lines were being built across the United States.
When was a telegraph invented?
Earlier long distance telegraphy was used from 1792 through semaphore lines or optical telegraphs. However electrical telegraphs were commercially introduced in 1837. Samuel Morse developed the Morse code which was the basic language of telegraphy.
What is the angle between lines of force and equipotential lines in an electrical field?
The angle is a right angle.
Why were telegraphs used during the civil war?
The Telephone had not been invented and telegraphs lines could be taped and taped to send messages by an army in the field and where much faster then when sent by horse.
The minimum distance between the declination station and such objects as power lines and electrical equipment is?
Power lines and electronic equipment: 150m
Why are there gaps between electrical lines?
Electrical flow creates magnetic fields around the wires. The distance helps prevent interruptions and problems in the flow.
Examples of parallel lines?
Railway tracks electrical lines
What voltage are electrical lines coming into a house in England?
The electrical lines to a typical house in the UK are 230 V 50 Hz.
What are powerlines used for in electricity?
Power lines are used to transport or transmit electrical energy from the electrical generator to the customers. Power lines are important for they help factories, commercial buildings and residences have electrical energy.
What kind of energy is in power lines?
Electrical energy. The whole purpose of power lines is to transfer energy from one place to another, in the form of an electrical current.
What is EHV lines?
EHV lines are type of electrical lines commonly used for experimentation in physics. They stand for 'Extra High Voltage' lines.
What are electrical suzis on a Arctic truck?
Electrical Suzis are the electrical lines passing alongside the hydraulic lines (or air lines) passing from the rear of the artic tractor unit; and connecting the the trailer. Hydraulic lines used to be colour coded, but this is no longer tha case. Hydraulic lines operate the trailer braking system (in conjunction with the footbrake and parking break); these lines include an emergency hydraulic line, should the first fail. The electrical connection lines operate the lights on the rear of the trailer, any running lines, and operates an anti-lock braking systems on the trailers axles. Electrical lines can also be used to power electrical auxiliary equipment; such as a tail-lift, or a HGV Box refrigeration unit. Hope this helps. Source: I'm an artic driver. :) J_vickers@live.co.uk
