I'm 13, but I still think Most fruit will conduct electricity because it contains water with various substances dissolved in it. How much electricity it conducts depends on how much water there is and what is dissolved in it.
Most fruits have some acid, which results in many free ions that allow the flow of electricity, so acidic fruits make quite good conductors of electricity (that is, with low resistance) the acids in them contain lots of ions. Because certain foods have chemicals that make electricity Acidic fruits make electricity are electrically charged particles an exchange of electrons between the two electrodes produces the electricity. The function of the fruit is to provide ions so that the reaction can take place. The chemical substances in fruits, particularly acidic citrus fruits, can be converted into energy. The structure of a fruit-powered battery mimics that of a real battery. Two different metals -- usually one zinc and one copper -- are inserted into the fruit and act as the positive and negative poles. A wire acts as a conductor between the poles and can be used to conduct a small amount of voltage (usually 1/2 to 3/4 of a volt from a single piece of fruit). Depending on the type and number of fruits being used you may be able to light a small LED light bulb or even run a small motor.
