Onyehn 0-24V Top Mosfet Button IRF520 MOS Driver Module for Arduino MCU ARM Raspberry pi

does this board have a "flyback diode" or a "back emf diode" which goes from pin 2 to pin 3 (across load , between source and drain on the mosfer?

This is voltage control only and no current control, correct?

Data sheet for irf520 shows vds max 100v. here it mentioned 24v, can i use this module load for 48v @ 1amp

Can this be used with ac power ? 24v ac ?