Question

Find the equivalent resistance of this parallel circuit with two strands.

Strand One: 7Ω

Strand Two: 49Ω

Answer 1

In a parallel circuit, the total resistance calculated from the individual resistances is computed from the formula: 1/Rt = 1/R1 + 1/R2. substituting R1 and R2, then
1/Rt = 1/7 + 1/49
1/Rt = 1/6.125 = 1/ 49/8
Rt = 49/8 Ω

The total resistance hence is 49/8 Ω