Question

Two wires that are made up of two different materials whose specific resistances are in the ratio 2 : 3, length 3 : 4 and area 4 : 5. The ratio of their resistance is-

• A. 6 : 5
• B. 6 : 8
• C. 5 : 8
• D. 1 : 2

Answer 1

Answer: (C)

5 : 8

Answer 2

Use R =

\ $\frac { \mathrm { R } _ { 1 } } { \mathrm { R } _ { 2 } }$ =