Question

Please answer P48

P48 In the circuit shown in Figure 18.110, the two thick wires and the thin wire are made of Nichrome. Figure 18.110 (a) Show the steady-state electric field at the locations indicated, including in the thin wire. (b) Carefully draw pluses and minuses on your own diagram to show the approximate surface-charge distribution in the steady state. Make your drawing show clearly the differences between regions of high surface-charge density and regions of low surface-charge density. (c) The emf of the battery is 1.5 V. In Nichrome there are n9 x 1028 mobile electrons per m, and the mobility of mobile electrons is u 7x 10-)(m/s)/(N/C). Each thick wire has length L1 = 20 cm = 0.2 m and cross-sectional area A, 9 × 10-8 m2· The thin wire has length L2 = 5cm 0.05 m and cross-sectional area A2 = 1.5 x 10mt. (The total length of the three wires is 45 cm.) In the steady state, calculate the number of electrons entering the thin wire every second. Do not make any approximations, and do not use Ohm's law or series-resistance equations. State briefly where each of vour equations comes from

Answer 1

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