A simple arc generator produces a low e.m.f . explain any three design alterations that you would make the generator in order to convert into higher e m.f?

1. Increase the number of turns in the coil: By increasing the number of turns in the coil, the magnetic field produced by the current flowing through the coil will be stronger, resulting in a higher induced e.m.f.

2. Use a stronger magnetic field: By using a stronger permanent magnet or electromagnet to create the magnetic field in the generator, the induced e.m.f will be higher due to the increased flux density.

3. Increase the speed of rotation: By increasing the speed at which the coil rotates within the magnetic field, the rate of change of magnetic flux will be higher, resulting in a higher induced e.m.f. This can be achieved by using a higher power input or gearing system to increase the rotational speed of the coil.