ZuoTi.Pro
Question

Really hard Physics problem! Help ASAP

Learning Goal: To learn to apply the concept ofcurrent density and microscopic Ohm's law.

A "gauge 8" jumper cable has a diameter d of 0.326 centimeters. Thecable carries a currentIof 30.0 amperes. The electric fieldEin the cable is 0.062 newtons per coulomb.What is the material of the cable?
science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1
WE KNOW THAT CURRENT DENSITY j = σE--1σ = SURFACE CHARGE DENSITYE = electric field = 0.062 newtons per coulombcurrent density j = I/AREAI = 30 AAREA = π(radius)2=π(0.163)2m2=3.14*(0.163)2m2radius = 0.326m/2 = 0.163 mj = 30/3.14*(0.163)2m2= 360A/m2from 1 360 A/m2 = σ*0.062 N/Cσ = 360/0.062 C/m2 = 5806C/m2by know ing charge density we can determine nature ofm,aterial(refer standard values of charge densities and see forσ = 5806C/m2 confirmwhich material it is)
answered by: miil
0 0
Add a comment
Answer #2

muklo

0 0
Add a comment
Answer #3

1.png

answered by: tothemoon
0 0
Add a comment
Know the answer?
Add Answer to:
Really hard Physics problem! Help ASAP
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra...

    Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...

  • 10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...

    10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT