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Millikan's oil drop experiment measures the value of electric charge of an electron. Oil is sprayed inside a chamber. Some of the oil drops get electrically charged due to friction with the nozzle, shown in figure below. Electric field in vertical direction is applied between two plates to balance the downward gravitational force with the upward electric force on the oil drop and to make it suspend in space. (m ' ' . microscope m , - In E p udfolm slum: eld Let's assume that the radius of a doubly charged oil drop is 1.23-pm;, density of the oil is 386 ltgi'm3 and the separation between the vertical plates is 16-cm. Neglect effect due to the air {like drag force and buoyant force). Charge of an electron, 0e - -1.)c1'19 C. What should be the applied electric potential difference between the plates to suspend the oil drop in air? The applied voltage, 'v' - C] U v Select an answer v Question Help: E Message instruc Submit Question no units required