state gov Bihar Vidhan Sabha DEO Mock Test 2024 General Science Physics Current Electricity

The resistance of a copper wire 200m long is 21Ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around -

1

1.8 × 10^-8 Ω-m

2

1.4 × 10-8 Ω-m

3

1.2 × 10-8 Ω-m

4

1.6 × 10-8 Ω-m

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