Physics, asked by sameervt923, 1 year ago

Two wires of same diameter of the same material having the length l and 2l

Answers

Answered by cbhavi28
1

Answer:

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Explanation:

Answered by Anonymous
1

Answer: 1:8

Explanation:. Resistance for a material

R varies length(l)

R varies 1/area(A)

Hence R=constant ×l/A

Constant depends on the material. Let it be k.

R1=(k1×l)/(π×r^2)

R2=(k2×2l)/[π×(r/2)^2]

R2=k2×8l/πr^2

R1:R2=k1×l/πr^2:k2×8l/πr^2

Since the material is same ..so k1=k2

R1:R2= 1:8

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