State two disadvantages of discharge tubes when used to study cathode rays. 

State two disadvantages of discharge tubes when used to study cathode rays. 

State two disadvantages of discharge tubes when used to study cathode rays. 

  • A gas is needed at very low pressure which may not be easy to achieve practically.
  • A very high p.d is needed across tube which may not be safe to handle
  • X-rays may be produced and these are unsafe.

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