A $1 \mathrm{~m}$ long copper wire carries a current of $1 \mathrm{~A}$. If the cross section of the wire is $2.0 \mathrm{~mm}^{2}$ and the resistivity of copper is $1.7 \times 10^{-8}\, \Omega \mathrm{m}$, the force experienced by moving electron in the wire is ____________ $\times 10^{-23} \mathrm{~N}$.
(charge on electorn $=1.6 \times 10^{-19} \,\mathrm{C}$)
Answer (integer)
136
Solution
<p>$I = ne{v_d}A$</p>
<p>$J = {E \over \rho }$</p>
<p>$$F = eE = {{1.7 \times 1.6 \times {{10}^{ - 19}} \times {{10}^{ - 8}}} \over {2 \times {{10}^{ - 6}}}}$$</p>
<p>$= 136 \times {10^{ - 23}}$ N</p>
About this question
Subject: Physics · Chapter: Current Electricity · Topic: Ohm's Law and Resistance
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