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Author Question: A high-resistance material is used as an insulator between the conductors of a length of coaxial ... (Read 105 times)

j.rubin

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on: Aug 6, 2020

Question 1

A cook plugs a 500 W crockpot and a 1 000 W kettle into a 240 V power supply, all operating on direct current. When we compare the two, we find that

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Icrockpot<Ikettle and Rcrockpot<Rkettle.

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Icrockpot<Ikettle and Rcrockpot>Rkettle.

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Icrockpot = Ikettle and Rcrockpot = Rkettle.

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Icrockpot>Ikettle and Rcrockpot<Rkettle.

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Icrockpot>Ikettle and Rcrockpot>Rkettle.


Question 2

A high-resistance material is used as an insulator between the conductors of a length of coaxial cable. The resistance material, which forms a hollow tube, has an inner radius a and an outer radius b, and the insulator provides a resistance R between the conductors. If a second insulator, made of the same material and having the same length, is made with double both the inner radius and the outer radius of the first, what resistance would it provide between the conductors?

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R

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2 R

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4 R

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(ln2)R

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R/(ln2)
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by j.rubin on Aug 6, 2020

AngeliqueG

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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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j.rubin

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Reply 2 on: Aug 6, 2020
YES! Correct, THANKS for helping me on my review

aliotak

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Reply 3 on: Yesterday
Excellent

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