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Q-1 Figure 24-45 shows a thin rod with a uniform charge density of 2.00 µC/m. Evaluate the electric potential at point P if d = D = L/4.00. Assume that the potential is zero at infinity. d D→ 21 R C Q-2 In Fig. 24-48, what is the net electric potential at the origin due to the circular arc of charge Q1 = +7.21 pc and the two particles of charges Q2 = 4.00Q1 and Q3 = -2.00Q1? The arc's center of curvature is at the origin and its radius is R = 2.00 m; the angle indicated is = 20.0°. R 2d L 92 Rod -Qs Q-3 Three particles, charge q1 = +10 μC, q2 = -20 μC, and q3 = +30 μC, are positioned at the vertices of an isosceles triangle as shown in Fig. 24-62. If a = 10 cm and b = 6.0 cm, how much work must an external agent do to exchange the positions of (a) q1 and q3 and, instead, (b) q1 and q2? A/2- 2.00R 0 93 a A 91 K₁ Q-4 Figure 25-49 shows a parallelplate capacitor of plate area A = 10.5 cm2 and plate separation 2d = 7.12 mm. The left half of the gap is filled with material of dielectric constant K1= 21.0; the top of the right half is filled with material of dielectric constant K2 = 42.0; the bottom of the right half is filled with material of dielectric constant K3 = 58.0. What is the capacitance? ·X A/2 X K₂ Ką d Q-5 In Fig. 25-46, how much charge is stored on the parallel-plate capacitors by the 12.0 V battery? One is filled with air, and the other is filled with a dielectric for which K = 3.00; both capacitors have a plate area of 5.00 x 10-3 m2 and a plate separation of 2.00 mm. 00