4. Two large, horizontal metal plates are separated by 0.050 m. A small plastic sphere is suspended halfway between them. The sphere experiences an upward electric force of 4.5 × 10-15 N, just sufficient to balance its weight. (a) If the charge on the sphere is 6.4 × 10-19 C, what is the potential difference between the plates? (b) Calculate the mass of the sphere.

4. Two large, horizontal metal plates are separated by 0.050 m. A small plastic sphere is suspended halfway between them. The sphere experiences an upward electric force of 4.5 × 10-15 N, just sufficient to balance its weight. (a) If the charge on the sphere is 6.4 × 10-19 C, what is the potential difference between the plates? (b) Calculate the mass of the sphere.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter7: Electric Potential

Section: Chapter Questions

Problem 100AP: A point charge of q=50108 C is placed at the center of an uncharged spherical conducting shell of...

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