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Question:
How are cathode rays formed?
How are cathode rays formed?
Answer:
- The 6V source first heats up the filament, which, in turn, heats up the cathode.
- The cathode thus exhibits thermionic emission and produces thermal electrons.
- The EHT exerts a strong electric field between the cathode and the anode, causing the thermal electrons to accelerate, and travel at a high speed and in a straight line towards the anode.
- The beam of fast-moving electrons generated is known as cathode rays.
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