Question

The chamber in the Millikan oil drop method is filled with

• A. air
• B. vaccum
• C. oil
• D. Water

Answer 1

The correct option is A

air

The chamber in the Millikan oil drop method is filled with air which attaches them with oil droplets making them acquire a negative charge. The speed of the droplet’s motion can be increased or decreased; when the amount of upward electric force equals the known downward gravitational force, the charged droplet remains stationary. The amount of voltage needed to suspend a droplet is used along with its mass to determine the overall electric charge on the droplet