- Total current increases: The addition of a new battery provides an additional source of electromotive force (EMF) in the circuit. As a result, the total current flowing through the circuit increases. Each battery in a parallel circuit contributes its own current to the total current.
- Resistance decreases: Parallel circuits are characterized by multiple paths for current to flow. With the addition of a new battery, there is an increase in the number of paths available for current. As a result, the overall resistance of the circuit decreases. This is because the total resistance in a parallel circuit is always less than the resistance of any single branch.
- Voltage remains the same: In a parallel circuit, all components are connected across the same potential difference. When a battery is added, the voltage across each branch of the circuit remains the same. This is because the batteries are connected in parallel, meaning they are connected side-by-side with their positive terminals connected together and their negative terminals connected together. As a result, the voltage across each battery and each branch of the circuit is the same.
Therefore, adding a battery to a parallel circuit leads to an increase in the total current and a decrease in the overall resistance, while the voltage across each branch remains unchanged.
