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- PHY102 Physics II © Dr.Cem Özdoğan
- Example, Charge Sharing, cont.:
- Fig. 21-10 (d) Negative charge is transferred through a grounding wire to sphere A. (e) Sphere A is then neutral.
- Reasoning: When we provide a conducting path between a charged object and the ground (which is a huge conductor), we neutralize the object.
- Where sphere A negatively charged, the mutual repulsion between the excess electrons would cause them to move from the sphere to the ground.
- However, because sphere A is positively charged, electrons with a total charge of Q/2 move from the ground up onto the sphere (Fig. 21-10d), leaving the sphere with a charge of 0 (Fig. 21-10e). Thus, there is (again) no electrostatic force between the two spheres.
- Ground → neutral
- (large enough reservoir)
- Creating a pathway between object and Earth’s surface
- Similar to initial picture, but reversed