Ch19 - Q18.2a Current is flowing in this circuit Direction...

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Q18.2a Current is flowing in this circuit. Direction of electron velocity at A ?
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Q18.2b Current is flowing in this circuit. Direction of electron velocity at B ?
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Q18.2c Steady state electron current at A vs. electron current at B ? 1) i A > i B 2) i A = i B 3) i A < i B
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Q18.2d Steady state electron current in thick wire vs. electron current in thin wire? 1) i 1 > i 2 2) i 1 = i 2 3) i 1 < i 2 4) Not enough information
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Q18.3a In a metal wire in a particular circuit: 1e-5 m/s = Drift speed 1e29 = # Mobile electrons / m 3 1e-4 (m/s)/(V/m) = Electron mobility 1e-6 m 2 = Cross-sectional area What is the magnitude of the electric field inside the wire? 1) 0.1 V/m 2) 10 V/m 3) 1e18 V/m 4) 1e-9 V/m 5) 1e-15 V/m
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Q18.3b Wires made of same material. Drift speed of electrons in thick wire vs. drift speed of electrons in thin wire? 1) v 1 > v 2 2) v 1 = v 2 3) v 1 < v 2 4) Not enough information
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Q18.3c Wires made of same material A 1 = 4*A 2 1) v 1 = 4*v 2 2) v 1 = (1/4)*v 2 3) v 1 = (1/16)*E 2 4) v 1 = 16*v 2 5) Not enough information
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Q18.3d Wires made of same material A 1 = 4*A 2 1) E 1 = 4*E 2 2) E 1 = (1/4)*E 2 3) E 1 = (1/16)*E 2 4) E 1 = 16*E 2 5) Not enough information
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Q18.3e Wires made of different materials n 1 = (1/3)*n 2 1) E 1 = 3*E 2 2) E 1 = (1/3)*E 2 3) E 1 = (1/9)*E 2 4) E 1 = 9*E 2 5) Not enough information
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Wires: different materials, same diameter Which statement is correct? ( n
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This note was uploaded on 02/04/2012 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.

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Ch19 - Q18.2a Current is flowing in this circuit Direction...

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