Question

Two wires of same metal have same length, but area of cross-sections are in the ratio 3 : 1. They are joined in parallel. If the resistance of thin wir
30 Ω, then the total resistance of the combination will be
Ο 2.5 Ω
Ο
7.5 Ω
Ο
Ο 5.5 Ω
Ο
Ο 11Ω​

Answer 1

➡️ the resistance of thin wire = 30 ohm

given ratio :- 3:1

answer is 7.5 ohm