In a seriesA circuit where one component follows directly from another, eg three bulbs in a row with no junctions are said to be connected in series. circuit, the total resistance across all of the components (the 'net resistance') increases as more components are added.
The two resistors have the same current through them. The potential difference across them will be different if they have different resistances. The total resistance (\(R_{T}\)) for this circuit is \(R_{1} + R_{2}\).