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NEET 2022

NEET 2022 Physics question on Current Electricity

A copper wire of length 10 m and radius 10−2π\dfrac{10^{-2}}{\sqrt{\pi}} m has electrical resistance of 10 Ω\Omega. The current density in the wire for an electric field strength of 10 (V/m) is
  1. A.
    104 A/m210^4\,\text{A/m}^2
  2. B.
    106 A/m210^6\,\text{A/m}^2
  3. C.
    10−5 A/m210^{-5}\,\text{A/m}^2
  4. D.
    105 A/m210^5\,\text{A/m}^2
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Correct option: D

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