Resistors connected in series: - If the
number of resistance are connected one after another in such a way that the
same current flows through each resistance, then the arrangement is called
resistance in series.
LetR1, R2 and
R3 are three resistances connected in a series combination and let
be their effective resistance in the circuit.
Let V1, V2 and V3 be
the P.D. across resistances R1, R2
and R3 respectively. Let ‘V’ be the P.D. of the cell. Let ‘I’ be the current flow through each
resistance.
According to
Ohm’s Law,
Conclusion:
If the resistors are connected in series then.
i.
In
a circuit the current is the same in every part of the circuit.
ii.
The
resistance of the combination of resistors is equal to the sum of the
individual resistors.
iii.
The
total voltage across the combination is equal to the sum of the voltage drop
across the separate resistors.
iv.
The
effective resistance in a series combination is greater than the individual
resistances.
v.
This
combination is used to increase resistance in a circuit.
