Discovery of Electron Quiz

Which tool is used to decrease the gas pressure in the experiment?

• Emitter

• Metallic plates

• Vacuum pump

• Glass tube

What is the purpose of the high voltage source in the experiment?

• To ionize the gas

• To decrease the gas pressure

• To detect the flow of current

• To provide a path for electrons

What was the initial mystery observed in the experiment?

• The gas was not ionizing

• The current was not flowing

• The emitter showed no deflection

• The current flowed despite the gas being an insulator

In the first part of the experiment, what was the result when a hole was made in the cathode?

• The emitter stopped deflecting

• A glow was observed on the fluorescent screen

• The gas pressure increased

• No glow was observed on the fluorescent screen

What conclusion was drawn from the second part of the experiment?

• Cathode rays are positively charged

• Cathode rays are streams of electrons

• Cathode rays do not exist

• Cathode rays originate from the anode

How do cathode rays behave in an electric field?

• They bend towards the negative plate

• They disappear

• They bend towards the positive plate

• They do not bend

What charge do cathode rays carry?

• Positive

• Negative

• Neutral

• Variable

What was concluded about the material dependency of cathode rays?

• They depend on the type of gas used

• They depend on the material of the electrodes

• They are independent of the material and gas

• They only occur in hydrogen gas

What fundamental particle was discovered through the study of cathode rays?

• Proton

• Photon

• Electron

• Neutron

Who is credited with the discovery of the electron?

• Ernest Rutherford

• JJ Thomson

• Niels Bohr

• Albert Einstein