How can the output voltage of a multiple-turn receiving loop antenna be increased?
By reducing the permeability of the loop shield
By utilizing high impedance wire for the coupling loop
By increasing the number of turns and/or the area enclosed by the loop✓Bonne réponse
All these choices are correct
Explication
The voltage induced in a loop is proportional to the number of turns and to the area they enclose, because both increase the magnetic flux linking the winding. Adding turns or enlarging the loop therefore raises the output voltage.