Question

Three point-like charges are placed at the corners of a rectangle as shown in the figure, a = 30.0 cm and b = 68.0 cm. Find the minimum amount of work required by an external force to move the charge q2 to infinity. Let q1 = −2.90 µC, q2 = +2.70 µC, q3 = −5.10 µC.

9. Three point-like charges are placed at the corners of a rectangle as shown in the figure, a = 30.0 cm and b = 68.0 cm. Find the minimum amount of work required by an external force to move the charge q2 to infinity. Let qı = -2.90 uC, q2 = +2.70 °C, q3 = -5.10 °C. --- Q.93 9,0 ------ ------Óq2

Answer 1

Soch 9., 3 -2.90 He 99 = 270 MC 93 = -5.10.16 9 = 30 cm, b: 68cm - C= Va²b² = 74-32 cm año an Initial polential Energy of system is are + Kay 4 KG, Tas Vi=9x109 [-2.9+27 - 207X510 + 2.995.107x 10-12 [ 0.68 0.30 + 0.7432" x 10-12 Vi = 9x10-35-11.515 - 45.9 +19.93 = -0.338 ] when az is moved to infinity Vj = k9,93 - 9410946-2.9)*(-5-100X10-12 -- = 0.1795 0.7432 : work done, we V-V; WE 0.179+0.338 = 0.517 J W=0.51731