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One copper wire having resistivity 1.7 xx 10^(-8) Omega, density 8.9 xx 10^(3) kgm^(-3), atomic weight 63.5g mol^(-1) , length 0.2 m and cross-sectional area10^(-6) m^(2)carries 2 A electric current. Find (i) potential difference across the wire. (ii) drift velocity of free electron . (Avogadro number =6.02 xx 10^(23) " mol"^(-1) and valency of copper = 1 ) |
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Answer» Solution :(i) V = 3.4 ` XX 10^(-3)` V , (II) `v_(d) = 7.4 xx 10^(-5)` m/s |
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