Two wires which are made of the same material have the same cross-sectional area, but different lengths l₁ and l₂. Prove that if they are used as fuse wires, they will melt for the same value of the current flowing through them, in the same time.

Physics Secondary School in Physics 11 months ago

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their AREAS are differentExplanation: P(RHO) = R A/lp1= p2A1/l1 = A2/l2A1/A2 = l1/l2

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