{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch 18 hw 1 - 1.03113e-5 1.03e-05 m/s 4 2/2 points | 2/4...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1. 2/2 points | 2/4 submissions Last Response | Show Details All Responses Notes If 1.7 10 16 electrons enter a light bulb in 4 milliseconds, what is the magnitude of the electron current at that point in the circuit? 4.25e18 4.25e+18 electrons/second 2. 2/2 points | 3/4 submissions Last Response | Show Details All Responses Notes If an electron current is 3.9 10 19 electrons/s. What is the conventional current? 6.24 6.24 A 3. 2/2 points | 2/4 submissions Last Response | Show Details All Responses Notes The density of mobile electrons in copper metal is 8.4 10 28 m -3 . Suppose that i = 3.0 10 18 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 2.1 mm. What is the drift speed of the electrons?
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1.03113e-5 1.03e-05 m/s 4. 2/2 points | 2/4 submissions Last Response | Show Details All Responses Notes The density of mobile electrons in copper metal is 8.4 10 28 m-3 . Suppose that i = 4.4 10 18 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.3 mm. In this case, about how many minutes would it take for a single electron in the electron sea to drift from one end to the other end of a wire 29 cm long? 122.4757036 122 minutes (A puzzle: if the drift speed is so slow, how can a lamp light up as soon as you turn it on? We'll come back to this in the next chapter.)...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern