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Charge to mass ratio of electron - Structure of Atom Video Lecture - Class 11

FAQs on Charge to mass ratio of electron - Structure of Atom Video Lecture - Class 11

1. What is the charge to mass ratio of an electron?
Ans. The charge to mass ratio of an electron is the ratio of the charge of an electron to its mass. It is denoted by e/m and has a value of approximately -1.76 x 10^11 coulombs per kilogram.
2. How is the charge to mass ratio of an electron determined?
Ans. The charge to mass ratio of an electron was determined by J.J. Thomson through his experiments on cathode rays. He used a cathode ray tube and applied electric and magnetic fields to deflect the rays. By measuring the deflections and knowing the strength of the fields, he was able to calculate the charge to mass ratio of the electron.
3. Why is the charge to mass ratio of an electron important?
Ans. The charge to mass ratio of an electron is important because it provides fundamental information about the nature of electrons. It played a crucial role in the development of the atomic theory and the understanding of the structure of atoms. Additionally, it is used in various scientific applications, such as particle accelerators and mass spectrometry.
4. How does the charge to mass ratio of an electron contribute to atomic structure?
Ans. The charge to mass ratio of an electron contributed to the understanding of atomic structure by suggesting that electrons are a fundamental part of atoms. J.J. Thomson's discovery of the charge to mass ratio of electrons led to the development of the "plum pudding" model of the atom, which proposed that electrons are embedded in a positively charged sphere. This model laid the foundation for further research on atomic structure.
5. Is the charge to mass ratio of an electron constant?
Ans. Yes, the charge to mass ratio of an electron is constant and does not depend on the velocity or energy of the electron. This means that regardless of the speed or kinetic energy of an electron, its charge to mass ratio remains the same. This property has been experimentally verified and is a fundamental characteristic of electrons.
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