4 1 4 A beam of electrons is accelerated through a potential difference V It is then passed normally through a uniform magnetic

Question

4 1 4 A beam of electrons is accelerated through a potential difference V It is then passed normally through a uniform magnetic field where it moves in a circle of radius r It would have moved in a circle of radius 2r if it were initially accelerated through a potential difference of 1 2v 2 2 V 3 2 2V 4 4 V

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