Assertion : Cyclotron does not accelerate electron.
Reason : Mass of the electrons is very small
AIIMS 2000, Easy
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Cyclotron does not accelerate electron because mass of electron is very small. It gets accelerated very appreciably as a result of which its mass increases. It result is mismatch between frequency of $a.c.$ used and frequency of rotation of electron in the Dee’s. So cyclotron stops accelerating electrons after some time.
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