Title: Power Outlets in Swiss Households

Fill in the missing words

Q: The peak voltage at a power outlet in a Swiss houlsehold is [...] however, the effective voltage is only [...]. This is because the electrical power of a [...] is the same as the electical power of a [...]. The current alternates with a frequency of [...] which means that within a [...] period the polarity changes from positive to negative once. The 50 Hz frequency is a common value in Europe and Asia in the USA however [...] are common.
A: 325 V; 230 V; 325 V peak AC voltage source; 230 V DC voltage source; 50 Hz; 20 ms; 60 Hz