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The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by
- a)Planck
- b)J.J.Thomson
- c)Einstein
- d)Millikan
Correct answer is option 'D'. Can you explain this answer?
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The fact that electric charges are integral multiples of the fundament...
The fact that electric charge are integral multiples of the fundamental electronic charge was proved experimentally by Millikan
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Introduction
The quantization of electric charge, where charges exist in integral multiples of the elementary charge (e), was notably demonstrated by Robert Millikan through his oil drop experiment.
Millikan's Oil Drop Experiment
- Millikan conducted experiments in 1909 to measure the charge of the electron.
- He suspended tiny oil droplets in an electric field and observed their motion.
Key Observations
- By adjusting the electric field, Millikan could balance the gravitational force on the droplets.
- He found that the charges on the droplets were always integral multiples of a fundamental value (~1.6 x 10-19 coulombs), which is the charge of a single electron.
Significance of Findings
- Millikan's results confirmed that electric charge is quantized and not continuous.
- His work provided strong evidence that the electron is the fundamental unit of charge.
Conclusion
- Millikan's experiments established the principle that all electric charges are multiples of the elementary charge, thus proving the discrete nature of electric charge.
- This groundbreaking work earned him the Nobel Prize in Physics in 1923 and solidified the understanding of charge quantization in physics.
In summary, the experimental proof of electric charges being integral multiples of the fundamental electronic charge is credited to Robert Millikan due to his meticulous experimental work.
The quantization of electric charge, where charges exist in integral multiples of the elementary charge (e), was notably demonstrated by Robert Millikan through his oil drop experiment.
Millikan's Oil Drop Experiment
- Millikan conducted experiments in 1909 to measure the charge of the electron.
- He suspended tiny oil droplets in an electric field and observed their motion.
Key Observations
- By adjusting the electric field, Millikan could balance the gravitational force on the droplets.
- He found that the charges on the droplets were always integral multiples of a fundamental value (~1.6 x 10-19 coulombs), which is the charge of a single electron.
Significance of Findings
- Millikan's results confirmed that electric charge is quantized and not continuous.
- His work provided strong evidence that the electron is the fundamental unit of charge.
Conclusion
- Millikan's experiments established the principle that all electric charges are multiples of the elementary charge, thus proving the discrete nature of electric charge.
- This groundbreaking work earned him the Nobel Prize in Physics in 1923 and solidified the understanding of charge quantization in physics.
In summary, the experimental proof of electric charges being integral multiples of the fundamental electronic charge is credited to Robert Millikan due to his meticulous experimental work.
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The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally bya)Planckb)J.J.Thomsonc)Einsteind)MillikanCorrect answer is option 'D'. Can you explain this answer?
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