The Nutrition of Prunes. With their dark and wrinkled skin, prunes may not be the prettiest fruits in the fruit stand, but there is no doubt that they are some of the healthiest foods you can eat. Whether you are dealing with bowel movement problems or trying to lose weight, prunes are an ideal fruit that you should add to your diet.
A voltaic cell is an electrochemical cell that uses a chemical reaction to produce electrical energy. 1  The anode is an electrode where oxidation occurs. 2  The cathode is an electrode where reduction occurs.  A salt bridge is a chamber of electrolytes necessary to complete the circuit in a voltaic cell.
Energy is required to force the electrons to move from the zinc to the copper electrode, and the amount of energy per unit charge available from the voltaic cell is called the electromotive force (emf) of the cell. Energy per unit charge is expressed in volts (1 volt = 1 joule/coulomb).