Question

Series parallel connection formula and information

Answer 1

Expression for series combination
$rs = r1 + r2$
the current flowing in a circuit depends upon the voltage applied and upon the total resistance in the circuit.
current in each resistance is same.
potential difference across each resistance is different and is proportional to the resistance.
equivalent resistance of the arrangement is given effective resistance is greater than any individual resistance.
In 'n'wires, each of resistance R, are connected in series, effective resistance is nR.

Expression for parallel combination

1/ Rp = 1/R1 + 1/R2
potential difference across each resistance is same.
current interest sisters are in proportional to the reciprocal of resistance.
effective resistance is less than any individual resistance.