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Questions and Answers
What was the primary apparatus used by J.J. Thomson in his experiment to discover the electron?
What was the primary apparatus used by J.J. Thomson in his experiment to discover the electron?
J.J. Thomson used a discharge tube in his experiment.
How do gases behave under normal pressure compared to in a vacuum according to Thomson's findings?
How do gases behave under normal pressure compared to in a vacuum according to Thomson's findings?
Under normal pressure, gases do not conduct electricity, but they do conduct when in a vacuum or at very low pressures.
What role do the metal plates in the discharge tube play during Thomson's experiment?
What role do the metal plates in the discharge tube play during Thomson's experiment?
The metal plates, labeled positive (+) and negative (-), are used to apply a high voltage and create an electric field.
What was the significance of applying high voltage in Thomson's experiment?
What was the significance of applying high voltage in Thomson's experiment?
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In what year did J.J. Thomson conduct his experiment that led to the discovery of the electron?
In what year did J.J. Thomson conduct his experiment that led to the discovery of the electron?
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Study Notes
J.J. Thomson's Experiment (1897)
- Thomson's experiment investigated the electron
- Gases under normal pressure do not conduct electricity
- Gases at low pressure do conduct electricity at a high voltage
- A discharge tube was used to study the electron
- Air was pumped out to create a low-pressure environment inside the discharge tube
- A high voltage was applied across two electrodes (metal plates) marked positive (+) and negative (-)
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Description
This quiz delves into J.J. Thomson's groundbreaking experiment conducted in 1897 that led to the discovery of the electron. It covers the principles of gas conduction under different pressure conditions and the setup of the discharge tube used in the study. Test your knowledge on the methods and implications of this pivotal research in physics.
