Is 240V AC or DC UK?

UK mains is 230 or 240v ac 50Hz . 50Hz means that the voltage cycles 50 times per second. For UK mains, the peak voltage is around 330v, and the overall ac waveform gives the same heating effect as 240v dc would. It is called 240v because it is equivalent to 240v dc for heating and lighting.

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Why some countries use 60Hz?

Why is 60Hz frequency used in America instead of the 50Hz used in most of the world? The use of 50 versus 60 Hz is purely due to historical reasons, with companies in the US making 60 Hz equipment and those in Europe making 50Hz equipment so that they have a monopoly . This rivalry led to the split you see today.

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