You are given chance of buying an electronic device that can be used to convert the generator in in part i1(b) into higher e.m.f describe one device which you will choose to buy for the purpose ?

I would choose to buy a voltage booster or voltage regulator for the purpose of converting the generator in part i1(b) into higher e.m.f. A voltage booster or regulator is a device that can increase the voltage output of a generator, allowing for higher e.m.f. to be produced. This would be useful in situations where a higher voltage is required for specific applications or to improve the efficiency of the generator.