Physics

Problem

1. State what is meant by the term *root-mean-square (RMS) value*,

I_{\text{RMS}}

, of a current,

I

. 2. How is the RMS current,

I_{\text{RMS}}

, related to the peak current,

I_0

? 3. In the UK, the RMS voltage of the mains supply is 240 V. Calculate the peak voltage.