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Questions and Answers
What is the primary purpose of Millikan's experiment?
What is the primary purpose of Millikan's experiment?
- To calculate the speed of charged particles
- To determine the mass of oil droplets
- To observe the behavior of electromagnetic fields
- To measure the electronic charge (correct)
What effect does the application of an electric field have on a charged oil droplet in Millikan's experiment?
What effect does the application of an electric field have on a charged oil droplet in Millikan's experiment?
- It increases the temperature of the droplet
- It can alter the droplet's motion based on the charge (correct)
- It causes the droplet to emit X-rays
- It eliminates the mass of the droplet
How is the charge on the droplet determined in Millikan’s method?
How is the charge on the droplet determined in Millikan’s method?
- By measuring the pressure exerted by the droplet
- By analyzing the frequency of droplet oscillation
- Through the balance of gravitational and electric forces (correct)
- Using a mathematical model of droplet size
What role do X-rays play in the determination of electronic charge in Millikan's experiment?
What role do X-rays play in the determination of electronic charge in Millikan's experiment?
What condition must be met for the oil droplet to remain motionless between the plates?
What condition must be met for the oil droplet to remain motionless between the plates?
Flashcards
Millikan experiment
Millikan experiment
An experiment conducted by Millikan to determine the elementary electric charge (e).
Electric charge of oil droplets
Electric charge of oil droplets
The charge acquired by oil droplets from ionizing air particles.
Electric field adjustment
Electric field adjustment
Adjusting the electric field to suspend a charged droplet in mid-air.
Gravitational force
Gravitational force
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Electric force
Electric force
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Study Notes
Millikan Experiment
- Millikan (1910) conducted an experiment to determine the electronic charge.
- The experiment utilizes insulated, parallel metal plates.
- Plates are charged by a voltage source (V).
- Tiny oil droplets are sprayed into the space between the plates.
- Oil droplets can pick up positive or negative ions from the air.
- X-rays or radioactive sources ionize the air.
- Oil droplets can be observed falling through a microscope.
- If a droplet is charged and an electric field is applied, the droplet's motion may accelerate, slow, or reverse depending on the charge's sign and magnitude.
- Adjusting the electric field will allow the droplet to remain stationary.
- Under these conditions, the gravitational force equals the upward electric force.
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Description
Test your understanding of Millikan's experiment to determine the electronic charge. This quiz covers the principles and mechanisms involved, including the role of charged oil droplets and electric fields. Perfect for students studying physics and electricity.
