This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What is the resistance of 1 000 m of 4-mm diameter copper wire? (Cu = 1.7 10-8 / ... (Read 104 times)

future617RT

  • Hero Member
  • *****
  • Posts: 543
on: Jul 28, 2018
What is the resistance of 1 000 m of 4-mm diameter copper wire? (Cu = 1.7  10-8  / m)

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?
 a. R
  b. 2 R
  c. 4 R
  d. (ln2)R
  e. R/(ln2)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Joc

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 28, 2018
Answer to Question 1

1.35 ohm

Answer to Question 2

a


future617RT

  • Hero Member
  • *****
  • Posts: 543
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


Joc

  • Sr. Member
  • ****
  • Posts: 317
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

A typical two-wire coil-on-plug ignition system showing the triggering and the switching being ... A typical two-wire coil-on-plug ignition system showing the triggering and the switching being ...
The sensing wire in a typical hot wire mass air flow sensor. The sensing wire in a typical hot wire mass air flow sensor.
Connections and settings necessary to measure fuel-injector resistance. Connections and settings necessary to measure fuel-injector resistance.
Set the meter to read ohms (V) and measure the resistance of the relay coil. The usual reading for ... Set the meter to read ohms (V) and measure the resistance of the relay coil. The usual reading for ...
Strawberries contain iron, copper, magnesium, phosphorus, vitamin B6, vitamin K and vitamin E Strawberries contain iron, copper, magnesium, phosphorus, vitamin B6, vitamin K and vitamin E
What is the total resistance of the circuit in Figure 1? 150 What is the total resistance of the circuit in Figure 1? 150
Video: Hormonal regulation of pregnancy - weeks 17 through 38

For a complete list of videos, visit our video library