Why the current produced by the generator is called as alternating current

Alternating current (AC) is defined by the periodic reversal of current direction. In a generator, the induced current changes direction every half cycle due to the rotation of the coil in the magnetic field. While the magnitude also increases and decreases, the defining characteristic that gives it the name 'alternating' is the reversal of direction. Option A describes the variation in magnitude, which is true but not the primary reason for the term 'alternating.' Therefore, option B is the best answer.