5. A conductive block in the shape of a rectangular solid has a cross-sectional area of 13 cm² across its width, and a length of 16 cm. The block has a resistance of 200 2. The block is maintained along its length. contains 7e+18 conduction electrons (be careful, this is not "n", although it will help you find "n"). Connecting a battery to the two ends of the block, a potential difference of AV= 26 V (A)What is the current (in A) in the block? O0.113 00.274 0.130 00.0507 O0.195 00.424 ✔ (B) If the current density is uniform, what is its magnitude (in A/m²? 100. 0211 087.0 O326 O39.0 150. ✔ (C)What is the drift speed (in m/s) of the conduction electrons? O0.0186 0.00724 0.0162 O0.0605 O0.0392 00.0279 (D)What is the magnitude of the electric field (in N/C or V/m) in the block (Consider this E-field to be constant along the length and remember that there is a formula for the relation between V and E for a constant E-field)? 163 063.4 O244 0141 O530. O343✔ (E)What is the Mean Free Time Between Collisions (in sec) of the free electrons in the block? 02.12e-15 02.54e-16 O1.37e-15 09.76e-16 O5.66e-16 O6.51e-16 (F)What is the conductivity (in (nm)-1) of the material? O0.535 01.30 0.615 00.923 02.01 00.240

5. A conductive block in the shape of a rectangular solid has a cross-sectional area of 13 cm² across its width, and a length of 16 cm. The block has a resistance of 200 2. The block is maintained along its length. contains 7e+18 conduction electrons (be careful, this is not "n", although it will help you find "n"). Connecting a battery to the two ends of the block, a potential difference of AV= 26 V (A)What is the current (in A) in the block? O0.113 00.274 0.130 00.0507 O0.195 00.424 ✔ (B) If the current density is uniform, what is its magnitude (in A/m²? 100. 0211 087.0 O326 O39.0 150. ✔ (C)What is the drift speed (in m/s) of the conduction electrons? O0.0186 0.00724 0.0162 O0.0605 O0.0392 00.0279 (D)What is the magnitude of the electric field (in N/C or V/m) in the block (Consider this E-field to be constant along the length and remember that there is a formula for the relation between V and E for a constant E-field)? 163 063.4 O244 0141 O530. O343✔ (E)What is the Mean Free Time Between Collisions (in sec) of the free electrons in the block? 02.12e-15 02.54e-16 O1.37e-15 09.76e-16 O5.66e-16 O6.51e-16 (F)What is the conductivity (in (nm)-1) of the material? O0.535 01.30 0.615 00.923 02.01 00.240

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 66AP: When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T ...

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Two conducting wires A and B of the same length and radius are connected across the same potential difference. Conductor A has twice the resistivity of conductor B. What is the ratio of the power delivered to A to the power delivered to B? (a) 2 (b) 2 (c) 1 (d) 12 (e)12
When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
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