College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
Related questions
Question

Transcribed Image Text:rcuite, Cuments, and vontged
Learning Goal:
To detemine the voltage and currants for eloments in an eloctric circut.
An electric dirouit contains circut dements connected togather in by conductors. Some typical elements in eloctric circuits include resistors, capacitors, inductors, and voltage sources. The behavior of cach eiement can be described in tems of the oument passing through the element and the voltage across the element.
dge)
Elactric cument is the time rate of fow of clectric charge in specified direction. Lat g(t) represent the net charge that has flowed through a surtace in a diraut diement or conductor. The oument is the time rate of change of the nat charge, 1(1) - Positive charge moving in the chosen direction and negative charge moving apposite the chosen direction are
both positive ouments. Positive charge moving opposite the chosen direction and negative charge moving in the chosen direction are both nogative cuments. The units of charge are coulombs, C, and the units of current are amperes A, which are the same as coulombs per socond, Cis.
The voitage associated with a cirout ciement is the enargy transfered per unt charge that flows through the element. Avoltage has a polarity botwoen the teminais of a circit element that indicates the diraction aof energy fow. a positive cument flows through a dirouit eiement trom the positive terminal to the negative teminal, then anergy is tranatemed into the
circut dlement where is is absorbed or used to do useful work. If a positive cument filows from the negatve teminal to the positive terminal, then the circuit element is transteming energy to the ciectric charges. The units of voltage are voits, V, which are the same as joules per coulomb, JC.
Part A- Calculating the number of electrons due to the current
How many aloctrons move past a fixod reforence paint overy t=4.60 ps it the cumrent is f=43 pA ? The charge on a singie clactron is about -1.6 x 10 C
Exprecs vour answer as an Integer
> Vlew Avalable Hinttc)
* O I ?
dlactrons
Submit
• Part B-Calculating current based on movement of charge
rQ, =1.5 Cof charge moves to the right in t =25swhile Qr =-125 mCof charge moves to the left in t=25s, what is the not cument to the right?
Exprecs your answer to two cignifoant figures and Inolude the appropriate units.
Vlew Avalable Hintte)
* O I ?
Value
Units
Submit
• Part C-Calculating voltage
E= 743 ml of anergy is transfered when Q = 1.21 Cof charge flows through a dirouit element, what is the voltage across the dirauit element?
Exprecs your answer to two cignifioant figures and Inolude the appropriate unite.
Vinw Avallahie Hintic)
Expert Solution
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