In the domestic supply, what is the typical mains voltage and frequency in the UK?

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Multiple Choice

In the domestic supply, what is the typical mains voltage and frequency in the UK?

Explanation:
Domestic mains in the UK is an alternating voltage that operates at 50 cycles per second (50 Hz) with a nominal RMS value of about 230 volts. The RMS value is the effective voltage for power and heating, even though the instantaneous voltage swings from peak to peak in a sine wave. The peak voltage is higher, around 325 volts, and the actual voltage can vary a bit within tolerance, typically around ±10%. This is why the best answer is 230 V RMS at 50 Hz. The other options mix in a frequency of 60 Hz (typical of some other countries) or use a locally outdated or less accurate nominal value (such as 240 V).

Domestic mains in the UK is an alternating voltage that operates at 50 cycles per second (50 Hz) with a nominal RMS value of about 230 volts. The RMS value is the effective voltage for power and heating, even though the instantaneous voltage swings from peak to peak in a sine wave. The peak voltage is higher, around 325 volts, and the actual voltage can vary a bit within tolerance, typically around ±10%.

This is why the best answer is 230 V RMS at 50 Hz. The other options mix in a frequency of 60 Hz (typical of some other countries) or use a locally outdated or less accurate nominal value (such as 240 V).

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