What were the two most important forces that Milikan worked with in the oil-drop experiment?

Electric Fields
1) The two objects shown are both positively charged. Which position could possibly have zero electric field?
– A
– B
– C
– D
– They could all have zero electric field

2) What were the two most important forces that Milikan worked with in the oil-drop experiment?
– frictional, electrical
– electric, gravitational
– magnetic, gravitational
– electric, magentic
– none are correct

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