{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Hwk5B-2

# Hwk5B-2 - PHYS 153 Term 2 2008-09 Homework 5B Feb 23 27...

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

+ + R = 8 . 0 Ω r 1 = 1 . 0 Ω r 2 = 1 . 0 Ω E 2 = 8 . 0 V E 1 = 12 . 0 V + + + 10 . 0 Ω 20 . 0 Ω 60 . 0 Ω 60 . 0 Ω 30 . 0 Ω 20 . 0 Ω 5 . 0 Ω 5 . 0 Ω 10 . 0 V 5 . 0 V E 15 . 0 Ω PHYS 153 Term 2, 2008-09 Homework 5B Feb. 23 - 27 Problem 1 Copper has 8 . 5 × 10 28 free electrons per cubic meter. A 71 . 0 cm length of 12-gauge copper wire that is 2 . 05 mm in diameter carries 4 . 85 A of current. (a) How much time does it take for an electron to travel the length of the wire? (b) Repeat part (a) for 6-gauge copper wire (diameter 4 . 12 mm) of the same length that carries the same current. (c) Generally speaking, how does changing the diameter of a wire that carries a given amount of current a ff ect the drift velocity of the electrons in the wire? Problem 2 In the circuit of the figure below, find (a) the current through the 8 . 0 Ω resistor and (b) the total rate of dissipation of electrical energy in the 8 . 0 Ω resistor and in the internal resistance of the batteries. (c) In one of the batteries, chemical energy is being converted
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern