A cell produces electricity. It also derives chemical reactions. A common example of cells is electrochemical cells, also called as batteries. There are two terminals in each and every cell.
In the series connection, components are connected in a sequential set of components. Here the cells are connected from end to end such that the same amounts of current passes through each and every cell in the circuit.
Now once we have understood in what fashion cells are arranged in a series connection, we will now move to calculating EMF of the cells in this type of connection. If “E” is denoted as the overall electromotive force of the battery along with n number cells, and “E1”, “E2
, “E3” , “En” be the electromotive force of individual cells, then
Parallel connection is denoted as the connectivity of the parts of the electrical circuit alongside the other parts. In cells that are in parallel connection, the amount of current gets divided among the different cells.
Suppose that the electromotive force of each cell is denoted as “E” and internal resistance of cells is denoted by “r”. As cells are connected in a series combination, the emf of each cell and the battery will be denoted as nE. The “equivalent resistance”will be denoted as nr. In case, when series of cells is combined in parallel connection, then the equivalent internal resistance for that series will be given as is nr/m.
The primary difference between a parallel circuit and a series circuit is that all of its components in a series connection share the same amount of current whereas in the case of a parallel connection, all the components have the same amount of potential difference in between them.
The total resistance in a circuit where the resistors are joined in a series combination is the total of the individual resistances. Each of the resistors connected in a parallel combination has got the same full voltage as applied by the source. The current that flows through each of the resistors present in a parallel combination varies on the basis of the resistance.
In a parallel combination of cells, the amount of difference in the electric potential across the different resistors is the same. In case of a parallel circuit, the reduction in the voltage across the different branches remains the same as the gain in the battery voltage. Thus, the drop in the voltage is measured to be same across all the resistors.
In a series connection, the current that flows through each resistor is the same. In case of an identical light bulb, the amount of resistance is the same for each resistor. The increase in the voltage in the battery has to be identical as the sum of voltage reductions across these resistors.
The major difference between any parallel and series resonance is that in case of a series resonance, the arrangement of all the circuit components forms the minimum impedance. On the other hand, in case of a parallel resonance, the arrangement of component forms the largest impedance.
Parallel circuits are considered to be more useful because when one of the circuits goes out, there are a few more circuits that can run the appliance which is not the case in series combination where there is only one circuit.
As in a series connection, the current has to flow through all the connected resistors; it causes the resistance to increase. This is not the case in parallel combination.