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Question

What conditions were maintained by J.J. Thomson during the production of cathode rays?


  1. High pressure, High voltage

  2. Low pressure, High voltage

  3. Low pressure, Low voltage

  4. High pressure, Low voltage


Solution

The correct option is B

Low pressure, High voltage


The discharge tube is a glass tube connected to a vacuum pump. J.J. Thomson created a very low pressure inside the discharge tube and applied high voltage.
He observed the formation of a greenish glow near the anode of the glass tube. This stream of rays emitted from the cathode is called cathode rays.

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