The diagram gives the details printed on an electric kettle. $240\,\text{V}\quad 50\,\text{Hz}$ $600\,\text{W}\quad 700\,\text{cm}^3$ What is the frequency of the electricity supply used to power the kettle?
- A$50\,\text{Hz}$
- B$240\,\text{V}$
- C$600\,\text{W}$
- D$700\,\text{cm}^3$