so that it could be suspended in the oil

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A copper ball of density pc and diameter d is immersed in oil of density po. What charge should be present on the ball , so that it could be suspended in the oil, if a homogeneous electric field E is applied vertically upward?
05
Dec
A copper ball of density pc and diameter d is immersed in oil of density po. What charge should be present on the ball , so that it could be suspended in the oil, if a homogeneous electric field E is applied vertically upward? A copper ball of density pc and diameter d is immersed [...]
Posted in: Arihant Physics by D.C Pandey , Chapter 1 - Electric Charges and Fields , Volume 2 ,
Tags: A copper ball of density pc and diameter d is immersed in oil of density po. What charge should be present on the ball , if a homogeneous electric field E is applied vertically upward? , so that it could be suspended in the oil ,