A copper wire of length 10 m and radius ( 10^ -2 ) m has electrical resistance of 10 …
Physics · NEET · NTA Exams — Current Electricity
A copper wire of length 10 m and radius \(\left(\frac{10^{-2}}{\sqrt{\pi}}\right)\) m has electrical resistance of 10 Ω. The current density in the wire for an electric field strength of 10 (V/m) is
- 10-5 A/m2
- 105 A/m2
- 104 A/m2
- 106 A/m2
Answer
(B) 10 5 A/m 2
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