cathode ray

What is cathode ray?

• laser

• fast moving electrons

• electromagnetic wave

• beta particles

When electrons are released from hot metal surface, it is known as..

• thermodynamic emission

• thermometric emission

• thermionic emission

The speed of cathode ray is affected by..

• potential difference of anode

• potential difference of cathode

• resistance of cathode

• resistance of filment

The amount of electron emission is affected by the followings except...

• density of cathode

• type of material of cathode

• surface area of cathode

• temperature of cathode

Cathode ray can be deflected by....

• electric field

• magnetic field

• both electric & magnetic field

• none of the above

Which particle escapes from the surface of the metal when it is heated at a high temperature?

• Proton

• Neutron

• Nucleon

• Electron

Which particle is cathode ray?

• Electron beam

• Gamma ray

• Neutron

• Alpha particles

Why do the electrons travel quickly through the tube?

• Because the electric field anode accelerates them

• Because they are repelled from the hot filament

• Because they are repelled from each other

• Because they are magnetically attracted to the fluorescent screen

• Because electrons always move quickly because of quantum stuff

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