When the loop of wire in an AC generator rotates halfway it?

When the loop of wire in an AC generator rotates halfway, it experiences a change in magnetic flux through the loop. This change induces an electromotive force (EMF) according to Faraday's law of electromagnetic induction, causing an alternating current (AC) to flow. As the loop continues to rotate, the direction of the induced current reverses, resulting in the characteristic alternating nature of the current produced by the generator.