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Question: Two wires that are made up of different materials, whose specific resistance are in the ratio 3:2 lengths 4:3 and area 5:4. The ratio of their resistance is
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Answer:
Ratio of resistance is 5:8
Explanation:
Calculation:Ratio of resistance = rho1×length1/area1 whole divided by rho2 ×length2/area2
=2×3/4 whole divided by 3×4/5
=2×3/4×5/3×4 [Since the fraction on the right side in division reciprocates and a multiplication sign is put in place of the division sign]
= After cancellation it comes as 5/4×2 =5/8=5:8 ➡️ ANSWER
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