What is the purpose of device ‘A’?

• To create an electrical potential difference (voltage) between the plates.

• To introduce a fine mist of liquid oil into the chamber.

• To magnify the droplets of the oil.

• To locate positively charged particles.

What is the purpose of device ‘C’?

• To locate positively charge particles.

• To create an electrical potential difference (voltage) between the plates.

• To introduce a fine mist of liquid oil into the chamber.

• To magnify the droplets of oil.

The Millikan Oil-Drop Experiment proved that:

• Showed that charges are continuous

• Showed that electrons are massless.

• Showed that the electric field only interacts with electrons

• Showed that charges come in integer multiples of the elementary charge e.

What is the purpose of device ‘D’?

• to charge the oil droplets

• to magnify the oil droplets

• to produce oil droplets

• to move oil droplets

Millikan's oil drop experiment could find:

• charge-to-mass​ ratio of electron

• Mass of the electron

• Velocity of an electron

• charge of an electron.

In the Millikan's oil drop experiment, Millikan was able to determine the charge on the electron, because...

• every oil drop in the experiment had one electron

• every oil drop in the experiment integer number of electrons

• every oil drop had the same charge

• every oil drop was the same size

What was the purpose of the oil drop experiment?

• To quantify the charge of an oil

• To quantify a proton's charge

• To quantify an electron's charge

• To quantify a neutron's charge

In a Millikan’s oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

• 3.9

• 4.2

• 6

• 4

Millikan's oil drop experiment could find:

• e/m ratio of the electron

• charge of electron

• mass of the electron

• velocity of an electron

Suppose the oil drop was ionized so that it became negatively charged. An electric field was applied between the plates. You will notice some drops will slow down but keep moving down,what condition for this oil drop will be correct?

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