Discovery of Electron Quiz
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Discovery of Electron Quiz

Created by
@CharismaticPersonification

Questions and Answers

Who discovered the electron through the Cathode ray discharge tube experiment?

J.J. Thomson

What happens when the pressure inside the cathode ray tube is reduced to 0.01 mm Hg?

The tube begins to glow

What is the name given to the rays that start from the cathode and move away from it in straight lines?

Cathode rays

What material is used to coat the tube behind the anode to check the cathode rays?

<p>Zinc sulphide</p> Signup and view all the answers

At what pressure does a dark space appear near the cathode inside the cathode ray tube?

<p>1 mm Hg</p> Signup and view all the answers

What happens when a very high voltage (about 10,000 volts) is applied between the two electrodes at normal pressure?

<p>No electric discharge occurs</p> Signup and view all the answers

What can be observed with the help of fluorescent or phosphorescent materials?

<p>Cathode rays</p> Signup and view all the answers

What happens to the cathode rays in the presence of an electric or magnetic field?

<p>They exhibit behavior similar to negatively charged particles</p> Signup and view all the answers

What do cathode rays consist of?

<p>Negatively charged particles called electrons</p> Signup and view all the answers

What do cathode rays (electrons) possess?

<p>Kinetic energy</p> Signup and view all the answers

What is the charge to mass (e/me) ratio of electron?

<p>$1.758 × 10^{11} C kg^{-1}$</p> Signup and view all the answers

How did R.A. Millikan determine the charge on the electrons?

<p>Through the oil drop experiment</p> Signup and view all the answers

Who modified the discharge tube experiment by perforating the cathode?

<p>$E. Goldstein$</p> Signup and view all the answers

What is emitted behind the perforated cathode according to E. Goldstein's experiment?

<p>$Canal$ rays</p> Signup and view all the answers

What happens when high voltage is applied between the two electrodes at normal pressure?

<p>Emission of cathode rays</p> Signup and view all the answers

What do cathode rays possess that allows them to do mechanical work?

<p>Kinetic energy</p> Signup and view all the answers

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