Session Problems (1).docx

# Session Problems (1).docx - '126 In the circuit in Figure...

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Unformatted text preview: '1’26 In the circuit in Figure 13.95 the narrow resistor is made of the same material as the thick connecting wires. In the steady state which graph in Figure 18.96 correctly shows the magnitude of the electric ﬁeld at locations around the circuit? “Resistor" ﬁgure 18.95 EJ111311: “1234515: {123456 (123456 1:11:11: 123456 123456 123456 Figure 13.95 In the stead}.r state. which graph in Figure 18.9? correctly shows the drift speed of the electrons at locations around the circuit? 1:11:11: (1.123456 (£23456 [0123456 11:11:: 123-456 123456 123-456 IP24 A steady-state current runs in the circuit shown in Figure 18.93. The narrate resistor and thick eunneeting wires are made of the same material. ﬁgure 13. 93 Which of the following quantities are greater in the thin resistor than in the thick wire? List all that apply: u, n, E, v, At :7, er nnne of these. IP30 Suppose that a wire leads into another, thinner wire of the same material that has only half the cross-sectional area. In the steady state. the number of electrons per second ﬂowing through the thick wire must be equal to the number of electrons per second ﬂowing through the thin wire. 1f the electric: ﬁeld E] in the thick wire is 1 a: Ill—2 NJC, what is the electric "ﬁeld E; in the thinner wire"? llIl’iﬂ Suppose that wire A and wire B are made of different metals and are subjected to the same electric ﬁeld in two diﬁerem circuits. Wire E has 6 times the cross-sectional area, 1.3 times as man},r mobile electrons per cubic centimeter, and 4 times the mobility of wire A. In the steady state, 2 a it'llIE electrons enter wire A erery second. How many electrons enter wire B every second? A conventional current 1 runs clock- wise around a loop of wire that lies in the x—y plane. As seen in the diagram, the top half of the wire is bent into a half circle of radius r and the bottom half is bent into a circle of radius R. Determine the magnitude and direc— tion of the magnetic ﬁeld at point C, the center of the circular arcs. To earn full credit for this problem you need to Show your work. ...
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• Spring '09
• Kindermann

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