Answer:
The simplest combinations of resistors are series and parallel connections (Figure 6.2. 1). In a series circuit, the output current of the first resistor flows into the input of the second resistor; therefore, the current is the same in each resistor.
Two or more resistances are said to be connected in series when they are connected end to end and the same current flows through each of them in turn. In this case, the equivalent or the total resistance equals the sum of the number of individual resistances present in the series combination
