mat-sln-asn-resquiz

# mat-sln-asn-resquiz - (d) The current in n = current out....

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Solution for Lab Quiz 14 Resistance Network Solution to Lab Quiz Problem 14.1(Why Kirchhof’s Loop Equation True?) Problem: Which of the following laws or principles is true primarily because the total work done on an electric charge around any closed path is zero? Select One of the Following: (a) Kirchho±’s Junction Rule (b-Answer) Kirchho±’s Loop Rule (c) Law of Linear Superposition (d) Newton’s Second Law (e) The In²eld Fly Rule (f) The Golden Rule Solution Kirchho±’s Loop Rule Total Points For Problem: 2 Points Solution to Lab Quiz Problem 14.2(What Happens to Current as it Passes Through a Resistor?) Problem: As current passes through a resistor, which of the following is true? Select One of the Following: 1

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(a) The current has less energy before passing through the resistor than after and the potential increases. (b-Answer) The current loses energy as it passes through the resistor and the potential is decreased. (c) The current is not aFected and the potential remains the same.
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Unformatted text preview: (d) The current in n = current out. (e) Charge is converted into heat in the resistor. Solution The current loses potential potential energy and potential decreases. Total Points for Problem: 3 Points Solution to Lab Quiz Problem 14.3(Electrons in Current) Problem: A certain direct current circuit carries a cur-rent of . 50A ±owing through a wire. We will assume the charges that move in the wire are electrons. How many electrons ±ow through a cross-section of the wire in 1 . minute? Select One of the ²ollowing: (a-Answer) 1 . 9 × 10 20 electrons . (b) 4 . 8 × 10 21 electrons . 2 (c) 7 . 7 × 10 16 electrons . (d) 3 . 1 × 10 18 electrons . (e) 1 . 2 × 10 10 electrons . Solution By defnition oF current, I = Δ Q Δ t = Ne Δ t , where N is the number oF electrons and − e is their charge; thereFore, N = I Δ t e = (0 . 5 A )(60 s ) 1 . 605 × 10 − 19 C = 1 . 9 × 10 20 electrons . Total Points for Problem: 3 Points 3...
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## This note was uploaded on 03/29/2010 for the course PHYS 2469 taught by Professor Stewat during the Spring '10 term at University of Arkansas Community College at Batesville.

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mat-sln-asn-resquiz - (d) The current in n = current out....

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