An alternating current is supplied to an electronic component with a rating that it be used only for voltages below 12 V.What is the highest Vrms that can be supplied to this component while staying below the voltage limit?

Question

Quizplus · Accepted Answer

The voltage limit given for the component is 12 V, which is the peak voltage (Vp) of the AC supply. To calculate the maximum Vrms, we divide the peak voltage by the square root of 2 (sqrt(2)). 
Vrms = Vp/sqrt(2) = 12/sqrt(2) = 8.485 V
Therefore, the highest Vrms that can be supplied to the component while staying below the voltage limit of 12 V is 6 V (Option A).

An Alternating Current Is Supplied to an Electronic Component with a Rating