2 What determines the voltage of an individual cell 3 What d

2. What determines the voltage of an individual cell? 3. What determines the current of an individual cell?

Solution

2)

The electrochemical properties of dissimilar materials determines the voltage of batteries(CELLS). For example an ordinary dry cell has a carbon rod as one electrode and a zinc case as the other with an electrolytic paste in between them. The open circuit voltage of this combination is 1.5 volts. Other combinations of material will have other voltages. When a battery is connected in a circuit, this creates a potential difference (V). This potential difference is the difference in potential energy of the charges that are in the conductors at the terminals of the cell/battery.

3)The number of electrons that travel through the external circuit every second is the current, I, measured in amps. Current is proportional to the number of photons