Current through Diode

https://www.quora.com/unanswered/An-AC-voltage-of-peak-value-20v-is-connected-with-an-Si-diode-with-a-load-resistance-of-500-ohm-If-the-forward-resistance-of-the-diode-is-10-ohm-what-is-the-peak-current-through-the-diode