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  • A long copper wire carries a current of <img alt="\mathrm{1 \mathrm

A \mathrm{1 \mathrm{~m}} long copper wire carries a current of \mathrm{1 \mathrm{~A}.} If the cross section of the wire is \mathrm{ 2.0 \mathrm{~mm}^{2}} and the resistivity of copper is \mathrm{1.7 \times10^{-8} \Omega \mathrm{m}, } the force experienced by moving electron in the wire is ___________ \mathrm{\times 10^{-23} \mathrm{~N}} . \mathrm{(charge \; on \; electorn =1.6 \times 10^{-19} \mathrm{C})}

Option: 1

136


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\mathrm{\ell=1 \mathrm{~m} }

\mathrm{I =1 \mathrm{~A} }

\mathrm{A =2 \times 10^{-6} \mathrm{~m}^2 }

\mathrm{\rho =1.7 \times 10^{-8} \Omega \mathrm{m}}
The force experienced by the moving electron in the wire is

\mathrm{F=q E=\frac{q J}{\sigma}=\mathrm{J\rho q} }

\mathrm{F=\left(\frac{1}{2 \times 10^{-6}}\right) \times\left(1.7 \times 10^{-8}\right) \times\left(1.6 \times 10^{-19}\right) }

\mathrm{F=\frac{2.72}{2} \times 10^{-21} }

\mathrm{F=136 \times 10^{-23} \mathrm{~N}}





 

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Rishabh

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