Physics – 4.5.2 The a.c. generator | e-Consult

Here are two suggestions to increase the current produced by the a.c. generator, along with the reasoning:

1. Increase the number of turns in the coil. The induced EMF in a coil is directly proportional to the number of turns of wire (EMF ∝ N). More turns mean a larger induced voltage, which in turn leads to a higher current if the resistance of the circuit remains constant. This is because a larger voltage drives more current through the circuit (Ohm's Law: I = V/R).
2. Increase the speed of rotation of the coil. The frequency of the induced EMF is directly proportional to the speed of rotation (f ∝ ω). A faster rotation means the magnetic flux linking the coil changes more rapidly, resulting in a higher induced voltage and therefore a higher current. This is because a faster change in magnetic flux induces a larger EMF.