A charged drop of mass m is suspended at rest by a uniform electric field between two horizontal plate electrodes (see figure below). The lower plate has an excess of positive charge and the upper plate has an equal amount of excess negative charge. A. Which plate is at a higher electric potential? B. Draw any two equipotential lines and indicate which line is at the higher electrical potential. C. If the drop is suspended at rest by the electric field, it must be negatively charged. Is this statement true or false? Briefly explainI

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.