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Author Question: The electron density in copper is 8.49 1028 electrons/m3. The electron charge is e = 1.60 1019 C. ... (Read 141 times)

cool

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on: Aug 6, 2020

Question 1

Most telephone cables are made of copper wire of either 24 or 26 gauge. If the resistance of 24-gauge wire is 137 Ω/mile and the resistance of 26-gauge wire is 220 Ω/mile, what is the ratio of the diameter of 24-gauge wire to that of 26-gauge wire?

◦
1.6

◦
1.3

◦
0.62

◦
0.79

◦
0.88


Question 2

The electron density in copper is 8.49 × 1028 electrons/m3. The electron charge is e = −1.60 × 10−19 C. When a 1.00 A current is present in a copper wire with a 0.40 cm2 cross-section, the electron drift velocity, in m/s, with direction defined relative to the current density, is

◦
−1.84 × 10−6.

◦
+1.84 × 10−6.

◦
−1.84.

◦
−5.43 × 105.

◦
+5.43 × 105.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by cool on Aug 6, 2020

gcook

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Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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cool

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Reply 2 on: Aug 6, 2020
:D TYSM

frankwu0507

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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