What is the variables of the effect of increasing the number of cells connected series on the current strength and potential difference in a circuit
The variables that affect the current strength and potential difference in a circuit when increasing the number of cells connected in series are:
1. Number of cells: The more cells that are connected in series, the higher the potential difference across the circuit. Each cell adds its voltage to the total voltage of the circuit.
2. Internal resistance of the cells: Cells have internal resistance, which affects the current flow in the circuit. As the number of cells increases, the total internal resistance also increases. This can lead to a decrease in the overall current strength in the circuit.
3. External resistance: The external resistance in the circuit also plays a crucial role. If the external resistance remains constant and the number of cells increases, the current strength increases since more cells will be generating current. On the other hand, if the external resistance is increased along with the addition of more cells, the current strength may decrease due to increased total resistance in the circuit.
To calculate the current strength and potential difference in a circuit with increased number of cells connected in series, you need to consider the voltage (emf) of each cell, the internal resistance of each cell, and the external resistance in the circuit. Using Ohm's law (V = IR), you can calculate the current strength by dividing the total voltage (sum of all cell voltages) by the total resistance (sum of external resistance and the internal resistance of all cells).
To determine the potential difference across the circuit, you simply add up the voltage of each cell. Keep in mind that the internal resistances may also affect the overall potential difference.