Distinguish between resistances in series and resistances in parallel.
Resistances in series: If a number of resistances are connected in such a way that the same current flows through each resistance, then the arrangement is called resistances in series. The current across each resistance is same. The equivalent resistance in series combination is greater than the individual resistances. This combination decreases the current.in the circuit. Resistances in parallel: If a number of resistances are connected between two common points in such a way that the potential differences across each of them is the same, then the arrangement is called resistances in parallel. The voltage across each resistance is same. The equivalent resistance in parallel combination is smaller than each of the individual resistances. This combination increases the current in the circuit.
