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QJEEM22Phdfcc: JEE Main 2022 Physics - Class 12 JEEM22Phdfcc Solution: A long copper wire carries a current of . If the cross section…

A 1 m1 \mathrm{~m} long copper wire carries a current of 1 A1 \mathrm{~A} . If the cross section of the wire is 2.0 mm22.0 \mathrm{~mm}^{2} and the resistivity of copper is 1.7×10−8 Ωm1.7 \times 10^{-8}\, \Omega \mathrm{m} , the force experienced by moving electron in the wire is ____________ ×10−23 N\times 10^{-23} \mathrm{~N} .

(charge on electorn =1.6×10−19 C=1.6 \times 10^{-19} \,\mathrm{C} )

Step-by-Step Verified Solution

I=nevdAI = ne{v_d}A

J=EρJ = {E \over \rho }

F=eE=1.7×1.6×10−19×10−82×10−6F = eE = {{1.7 \times 1.6 \times {{10}^{ - 19}} \times {{10}^{ - 8}}} \over {2 \times {{10}^{ - 6}}}}

=136×10−23= 136 \times {10^{ - 23}} N

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