Discovery of Proton Quiz

What is the role of the vacuum pump in the cathode ray tube?

• To decrease the gas pressure

• To increase the gas pressure

• To detect current flow

• To provide high voltage

Which component of the cathode ray tube is used to detect the flow of current?

• Glass tube

• Vacuum pump

• Metallic strips

• Mmeter

What did JJ Thompson use to coat the back side of the anode in his experiment?

• Silver nitrate

• Copper plate

• Zinc sulfide

• Gold foil

What was the main observation in JJ Thompson's experiment that led to the discovery of electrons?

• Cathode rays deflected towards the anode

• Anode rays deflected towards the cathode

• Anode rays passed through the cathode and hit the fluorescent screen

• Cathode rays passed through the anode and hit the fluorescent screen

What did Goldstein observe when he provided high voltage in his canal ray experiment?

• Rays traveled from cathode to anode

• No rays were observed

• Rays traveled in a circular path

• Rays traveled from anode to cathode

Why are canal rays also known as anode rays?

• They travel in a circular path

• They are produced by the anode

• They are produced by the cathode

• They are negatively charged

What did Goldstein's experiment reveal about the charge of canal rays?

• They are neutral

• They have no charge

• They are negatively charged

• They are positively charged

What was the significance of Goldstein's discovery of canal rays?

• It showed that atoms are indivisible

• It provided the first evidence of positive particles inside the atom

• It demonstrated the wave nature of light

• It proved the existence of electrons

What particles did Rutherford use in his experiment to discover the proton?

• Neutrons

• Gamma rays

• Beta particles

• Alpha particles

What was the outcome of Rutherford's experiment with nitrogen and alpha particles?

• Discovery of electrons

• Discovery of gamma rays

• Discovery of neutrons

• Discovery of protons