& Where in the National Grid is the voltage highest? Why is this?
why?
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Explanation:
The voltage is increased from about 25,000 Volts (V) to 400,000 V causing the current to decrease. Less current means less energy is lost through heating the wire. To keep people safe from these high voltage wires, pylons are used to support transmission lines above the ground.
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Answer:
The high transmission voltages are to reduce large losses from joule heating in the transmission cables. And the low voltages in the home are for reasons of safety. Picture 5.3 The power delivered is V x I We can either use a small voltage and draw a big current or use a higher voltage and draw a smaller current.
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