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Thomson by his experiment concluded that electrons are chargeless particles.

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Important Questions on Dual Nature of Radiation and Atomic Physics

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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Electrons behave like gas in J.J. Thompson experiment because they
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
The number of completely filled shells for the element  16S32 is
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Cathode rays are shot out of cathode and travel in a straight line. 
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
How can you conclude that the electrons are fundamental particles?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
How will you explain that the electron is a negatively charged particle?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Name the constituent of cathode rays. What is the magnitude of charge and mass present on it?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
What are the cathode rays?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron

The following diagram is of the simplified version of an electron gun which is an integral part of a cathode ray tube. 'A' is a filament and 'B' is a metal cylinder.

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Copy the diagram in your answer book. Draw a pair of plates P1 and P2 to apply electric field, a screen S and an enclosure.

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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
How are cathode rays produced? Explain with the help of a diagram.
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Draw a labelled diagram showing the presence of charge on cathode rays in a discharge tube.
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
When and by whom was the electron discovered?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Which of the following is never true for cathode rays?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
What are the constituents of cathode rays?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
What happens when cathode rays are passed through an electric field between two parallel plates? Is it possible to determine the charge on the particles of cathode rays?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Cathode rays consist of negatively charged particles called _____.
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Explain how cathode rays are formed from the gas taken in a discharge tube.
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Explain the experiments performed by scientists for the discovery of electrons.

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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Who discovered the presence of electrons in an atom? Discuss detailed experiment connected with it. How its mass and charge were determined?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
Give the name of the scientist who discovered the electron. Describe the experiment conducted for the discovery of electrons. How are the mass and charge of electrons determined?
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Physics>Modern Physics>Dual Nature of Radiation and Atomic Physics>Discovery of the Electron
How is it demonstrated that cathode rays are made up of material particles having mass and kinetic energy?