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  • Help me please, Gases begin to conduct electricity at low pressure because

Gases begin to conduct electricity at low pressure because

  • Option 1)

    At low pressure gases turn to plasma

  • Option 2)

    Atoms break up into electrons and protons

  • Option 3)

    Electrons in atoms can move freely at low pressure

  • Option 4)

    Colliding electrons can acquire higher kinetic energy due to the increased mean free path leading to ionisation of atoms.

 

Answers (1)

As we learnt in

Photoelectric Effect -

The electrons are ejected from the metal surface as soon as the beam of light of a particular frequency strikes the surface.

-

 

 Only high energy electrons can ionize electrons from gas atoms and for electrons to gain energy, they must have a long mean free path which is possible only when pressure is love.

 


Option 1)

At low pressure gases turn to plasma

Incorrect option

Option 2)

Atoms break up into electrons and protons

Incorrect option

Option 3)

Electrons in atoms can move freely at low pressure

Incorrect option

Option 4)

Colliding electrons can acquire higher kinetic energy due to the increased mean free path leading to ionisation of atoms.

correct option

Posted by

Vakul

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