What will happen if a circular coil is used instead of a rectangular coil as the conducting coil in a generator?

when we use our circular coil, the magnetic field will always be perpendicular to the area vector. thus, due to this, sin wt gives sin 90 degree and that gives 1, giving maximum linking of flux associated with the coil at any position.

When we use a circular coil, the magnetic field will always be perpendicular to the area vector. Thus, due to this, sinωt ⁡ gives sin90∘ ⁡ and that gives 1, giving maximum linking of flux associated with the coil at any position.