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Current Electricity on Physics related Questions and Answers


Question :   A wire of 50 cm long and 1 mm2 in cross-sectional area carries a current 4A when connected to a 2V battery. The resistivity of the wire is
1. 4 x 10-6 Ωm
2. 2 x 10-7 Ωm
3. 5 x 10-7 Ωm
4. 1 x 10-6 Ωm
Answer :   4 - 1 x 10-6 Ωm  

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