Final answer:
Adding another cell to a circuit with a buzzer and an ion meter will increase the current, as the total voltage across the circuit is increased, driving a stronger current. The buzzer may sound louder and the ion meter will show a higher current reading.
Step-by-step explanation:
When the student adds another cell to the circuit, which includes an ion meter and a buzzer, the current in the circuit is likely to increase. This is due to the fact that each cell has a certain voltage that it contributes to the overall circuit. When cells are connected in series, their voltages add up, resulting in a higher total voltage across the circuit. A higher voltage causes a greater electrical potential difference, which drives a stronger current through the circuit, assuming that the resistance remains constant. Therefore, when another cell is added, the buzzer may sound louder or more intense due to the increased current flow, and the ion meter should show a higher current reading.
The ammeter that was mentioned would record the higher current passing through the circuit, just as it would when ions move in a solution to carry the electrical current. In the analogy of peas moving in a straw, the electrons in the circuit correspond to the peas, and the additional cell's voltage acts as an increased supply of energy, pushing more electrons through the circuit (like more peas through the straw), thereby increasing the current. Essentially, adding another battery is like adding more energy to push the electrons through the circuit.