Oil Drop Experiment Concepts

The video explains the oil drop experiment by Millikan and Fletcher, which determined the charge of an electron. The experiment used oil drops suspended between charged plates to balance gravitational and electric forces. By adjusting the voltage, they could measure the charge on the drops. The experiment revealed that the charge on oil drops was always a multiple of a fundamental charge, leading to the discovery of the electron's charge as -1.6 x 10^-19 coulombs.

What was the main goal of the oil drop experiment conducted by Millikan and Fletcher?

• To calculate the gravitational force on oil drops

• To measure the mass of an electron

• To determine the charge of an electron

• To find the speed of light

What role does the atomizer play in the oil drop experiment?

• It generates electric fields

• It balances the oil drops

• It measures the charge of electrons

• It sprays oil into tiny droplets

How do the electric and gravity forces interact in the oil drop experiment?

• They act in opposite directions

• They both pull the oil drop downwards

• They have no effect on the oil drop

• They both push the oil drop upwards

What happens to the oil drop when the voltage is increased significantly?

• The oil drop evaporates

• The oil drop moves downwards

• The oil drop moves upwards

• The oil drop remains stationary

What is the significance of adjusting the voltage to achieve equilibrium in the oil drop experiment?

• It increases the charge on the oil drop

• It balances the electric and gravity forces

• It helps in measuring the mass of the oil drop

• It allows the oil drop to evaporate

What pattern did Millikan and Fletcher observe in the charges of the oil drops?

• The charges were all zero

• The charges were all negative

• The charges were multiples of a constant value

• The charges were random

What unit is used to measure the charge in the oil drop experiment?

• Zepto coulombs

• Coulombs

• Volts

• Milligrams

How did the loss of electrons affect the charge of the oil drops?

• The oil drops gained mass

• The oil drops became negatively charged

• The oil drops became positively charged

• The oil drops remained neutral

What conclusion did Millikan and Fletcher draw about the charge of an electron?

• It is a fixed, quantized value

• It cannot be measured

• It is a variable quantity

• It is always positive

What is the charge of one electron as determined by the oil drop experiment?

• 1.6 x 10^-19 coulombs

• -1.6 x 10^-19 coulombs

• 0 coulombs

• 1 coulomb