Answer
$V=340V$
Work Step by Step
We can find the required maximum voltage as
$V=\sqrt{2}V_{rms}$
We plug in the known values to obtain:
$V=\sqrt{2}(240)$
$V=340V$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.