Class 12 Physics Dual Nature of Radiation and matter Cathode Rays and Electron Emission

Easy

Who discovered the presence of electric charge on an electron?

A
$J$. $J$. Thomson
B
Millikan
C
Newton
D
Franklin

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Class 12 Questions

Class 12

Physics Questions

Chapter

Dual Nature of Radiation and matter

Subtopic

Cathode Rays and Electron Emission

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Which one is the correct relation for thermionic emission?

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The specific charge of an electron is

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Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field,their path will be:

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In Thomson's method of determining $e/m$ of electrons,how are the electric and magnetic fields arranged relative to the electron beam?

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The color of the positive column in a gas discharge tube depends on:

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