A conductive block in the shape of a rectangular solid has a cross-sectional area of 12 cm2 across its width, and a length of 16 cm. The block has a resistance of 220 Ω. The block 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 ΔV= 19 V is maintained along its length. (A)What is the current (in A) in the block? a)0.130 b)0.0337 c)0.0864 d)0.282 e)0.182 f)0.0751 (B)If the current density is uniform, what is its magnitude (in A/m2? a)62.6 b)152 c)72.0 d)235 e)108 f)28.1 (C)What is the drift speed (in m/s) of the conduction electrons? a)0.0402 b)0.0123 c)0.0260 d)0.00481 e)0.0185 f)0.0107
A conductive block in the shape of a rectangular solid has a cross-sectional area of 12 cm2 across its width, and a length of 16 cm. The block has a resistance of 220 Ω. The block 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 ΔV= 19 V is maintained along its length. (A)What is the current (in A) in the block? a)0.130 b)0.0337 c)0.0864 d)0.282 e)0.182 f)0.0751 (B)If the current density is uniform, what is its magnitude (in A/m2? a)62.6 b)152 c)72.0 d)235 e)108 f)28.1 (C)What is the drift speed (in m/s) of the conduction electrons? a)0.0402 b)0.0123 c)0.0260 d)0.00481 e)0.0185 f)0.0107
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter19: Capacitors
Section: Chapter Questions
Problem 3PA: You find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors...
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5. A conductive block in the shape of a rectangular solid has a cross-sectional area of 12 cm2 across its width, and a length of 16 cm. The block has a resistance of 220 Ω. The block 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 ΔV= 19 V is maintained along its length.
(A)What is the current (in A) in the block?
a)0.130 b)0.0337 c)0.0864 d)0.282 e)0.182 f)0.0751
(B)If the current density is uniform, what is its magnitude (in A/m2?
a)62.6 b)152 c)72.0 d)235 e)108 f)28.1
(C)What is the drift speed (in m/s) of the conduction electrons?
a)0.0402 b)0.0123 c)0.0260 d)0.00481 e)0.0185 f)0.0107
(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)?
a)103 b)251 c)46.3 d)119 e)387 f)178
(E) i)What is the Mean Free Time Between Collisions (in sec) of the free electrons in the block?
a)5.15e-16 b)2.31e-16 c)5.92e-16 d)8.87e-16 e)1.93e-15 f)1.25e-15
ii)What is the conductivity (in (Ωm)-1 ) of the material?
a)0.527 b)1.98 c)0.909 d)1.28 e)0.236 f)0.606
Please answer c) d) and e) with both sub parts, completely and show all the parts.
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