✔ 最佳答案
Resistance ∝ Lenght/Area
When the wire of 32 Ω is cut into 4 equal lengths :
Resistance of each length = (32 Ω) × (1/4) = 8 Ω
Equivalent resistance of the three lengths in parallel
= 1 / [(1/8) + (1/8) + (1/8)]
= 8/3 Ω
= 2.7 Ω
Equivalent resistance of combinations of 4 lengths
= (2.7 + 8) Ω
= 10.7 Ω