_ cathode is used in discharge tube experiment for discovery of protons.
Correct answer: C. Perforated
- A. Flat
- B. Round
- C. Perforated
- D. Oval
Explanation
Perforated" is the correct answer. In the discharge tube experiment, a cathode with a small hole or perforation is used to allow the passage of particles from the cathode to the anode. This setup helps in the discovery of protons by observing the deflection of these particles in the presence of an electric or magnetic field.
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