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CDS I 2021 GK Q103

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1. We are given three copper wires of different lengths and different areas of cross-section. Which one of the following would have highest resistivity?

Copper wire of 50 cm length and 1 mm diameter

Copper wire of 25 cm length and 0.5 mm diameter

Copper wire of 10 cm length and 2.0 mm diameter

All the wires would have same resistivity

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CDS I 2021 GK Q103

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