This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Version One Homework 5 Savrasov 39821 Apr 16, 2007 1 This printout should have 8 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. The due time is Central time. Current in a Conductor 01 27:01, calculus, numeric, > 1 min, normal. 001 (part 1 of 2) 1 points The current I = a t 2 b t + c in a section of a conductor depends on time. What quantity of charge moves across the section of the conductor from t = 0 to t = t 1 ? 1. q = a t 3 1 b 2 t 2 1 + c t 1 2. q = a t 2 1 b t 1 + c 3. q = a t 3 1 b t 2 + c t 1 4. q = a 3 t 3 1 b 2 t 2 1 + c t 1 correct 5. q = a 3 t 3 1 b 2 t 2 1 + c Explanation: The unit of current is Coulomb per second I = d q dt or dq = I dt . To find the total charge in coulombs that passes through the conductor, one must inte grate the current over the time interval. q = Z t 1 dq = Z t 1 I dt = Z t 1 ( a t 2 b t + c ) dt = a 3 t 3 1 b 2 t 2 1 + c t fl fl fl fl t 1 = a 3 t 3 1 b 2 t 2 1 + c t 1 . 002 (part 2 of 2) 1 points If I is in A, and a = 2 C / s 3 , b = 3 C / s 2 , and c = 7 C / s, what quantity of charge moves across the section of the conductor from t 1 = 2 s to t 2 = 4 s? Correct answer: 33 . 3333 C. Explanation: Let : a = 2 C / s 3 , b = 3 C / s 2 , c = 7 C / s , t 1 = 2 s , and t 2 = 4 s ....
View Full
Document
 Spring '10
 Turner

Click to edit the document details