Question

two wires of same material and same length have radii 1 mm and 2mm respectively compare their i.)resistance ii.) specific resistance​

Answer 1

Step-by-step explanation:

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Answer 2

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Answer

(i)R= A/fl

According to the question

R¹ = π(1×10-³)² fl

R² = π(2×10-³ )² fl

R² R¹ = (1×10-³ )² fl

(2×10-³)² = 1⁴

Thus,R¹ :R² ::4:1 i.e, first resistance is four times the second resistance

(ii) specific resistance ≅ Resistivity (f) depends on

the material of the wire and as according

to the question both wires are of same

material ⇒ resistivity of both wires is same.