Question: the value of a direct current and the peak value of a sinusoidal alternating current are equal

title: Root mean square
text: = R ⟨ I ( t ) 2 ⟩ ( \ displaystyle ( ) = R \ left \ langle I ( t ) ^ ( 2 ) \ right \ rangle \ , \ ! ) ( as R does not vary over time , it can be factored out )