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why step up transformer is used to deliveret current? Answered

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rickharris

4 years ago

Not sure what your question means.

BUT

A transformer can increase or decrease the voltage applied to the primary.

It will do this but to balance the power equation the current must go up or down as well.

Voltage increases current decreases

voltage decreases current increases.

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sixsmithrickharris

Answer 4 years ago

also, as voltage increases resistance decreases which permits longer distance electrical transmission with less power (Watts) loss.

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steveastrouksixsmith

Answer 4 years ago

No, resistance stays exactly the same. The energy LOST decreases however.

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sixsmithsteveastrouk

Answer 4 years ago

let me rephrase, as the voltage increases the electricity's ability to overcome resistance is increased.

However, when you step up and step down electrical current the resistance does change, it is in ohms law, the only thing that stays relatively the same throughout is power (watts)

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steveastrouksixsmith

Answer 4 years ago

No again. Resistance is CONSTANT, in metal conductors. The aim here is that, for the same wires, at constant POWER transmitted, the current FALLS, so the voltage drop inthe wire, and losses, decrease.