Question

what is parallel combination of resistance ? calculate resltuant resistance of parallel combination of three resistance.​

Answer 1

For series connection resultant resistance=R1+R2+R3. In parallel we add the inverses to get the inverse of resultant resistance. So for parallel combination, 1/resultant resistance=1/R1+1/R2+1/R3.

Answer 2

Explanation:

Parallel Resistor Equation

If the two resistances or impedances in parallel are equal and of the same value, then the total or equivalent resistance, RT is equal to half the value of one resistor. ... We now know that resistors that are connected between the same two points are said to be in parallel.

$\frac{1}{r} = \frac{1}{r1} + \frac{1}{r2 } + \frac{1}{r3}$