If we want to transmit electic current for a long distance, we must minimize a heat that releases because of the resistanse. We cannot make a cable wide because it is expensive and it will be massive. So, we must decrease a current because Q=I2RΔt. A power that we want to transmit is constant, P=UI, so we must increase the voltage. Nevertheless, Q=U2RΔt, so if we increase the voltage, the heat will increase too. And for addition, U=IR, so if we decrease the current, the voltage will decrease too.
Could you, explaine in details where I have a mistake.
P.S. sorry for my English, I am not a native speaker.
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