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Process of emission of electrons from hot metal surfaces is called

• photoelectric effect

• thermionic emission

• static emission

• emission current

Particles emitted from a hot cathode surface are:

• negative ions

• photon

• protons

• electrons

Cathode rays carry

• negative charge

• positvie charge

• neutral particles

• electrons and protons

Cathode rays can be deflected by

• electric fields only

• magnetic fields only

• quantum fields

• magnetic and electric fields

How are the electrons made into a beam?

• Using a high voltage across the tube.

• Use of an anode to spread the electrons.

• Use of positive anode to focus the electrons.

• Use of a fluorescent coating at the end of the tube.

How is the electron beam detected?

• Use of a fluorescent screen.

• By deflecting the beam of electrons with a magnetic field.

• By deflecting the beam of electrons with an electric field.

• Using an electron microscope.