Nailing Challenging Secondary School Physics

By: Rajiv Misra
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Topic: Electricity

Key Words : Resistance, area, inversely proportional

Answer: Wire A will have a higher resistance. This is because resistance is inversely proportional to cross-sectional area. As wire A has a smaller cross-sectional area, it will have a higher resistance.

Tip: Resistance= (Resistivity x Length) / Cross-sectional Area

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Posted on 21/04/2017

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