railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Physics Current Electricity

The resistance of a wire of length L. and area of cross-section A is 0.2 Ω. The resistance of a wire of the same material, but of length 2L and area of cross-section 4A will be:

1
0.4 Ω
2
0.1 Ω
3
10 Ω
4
0.2 Ω
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