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First off, voltage and current are two completely different, yet related phenomenons.

Kirchoff's law states that Voltage = Current * Resistance (V=IR. So, to change the voltage in a given circuit while keeping current constant, simply change the resistance.

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12y ago
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11y ago

It's called a transformer. They can depend on what type they are. The one near the power plants raise the electrical current and the cylinders in the electrical pole are Transformers lower the electrical current to be used in your home.

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Q: What changes the voltage of a current?
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