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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CATEGORIES A-level modern physics
TAGS Dr. Bbosa Science