Question: In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass 2.2 10-13 kg remains stationary when the potential

In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart.

In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass 2.2 10-13 kg remains stationary when the potential difference between the plates is 350 V with the upper plate negative. a) Is the sphere positively or negatively charged? Explain. b) Calculate the magnitude of charge on the sphere.

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