Question

N resistances each of r ohm, when connected in parallel give an equivalent resistance of r ohm. If these resistances were connected in series, the combination would have a resistance in ohms equal to

Answer 1

When the resistors are connected in parallel their equivalent resistance is smaller than the individual resistance of a resistor
1/r=1/r+1/r+1/r..........+1/rn

When the resistors are connected in series their equivalent resistance is greater than the individual resistance of a resistor

r=r+r+r......+rn