Question

a beam of electrons is accelerated through a potential difference V.it is then passed normally through a uniform magnetic field

Answer 1

Explanation:

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 accelarated through a potential difference.

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Answer 2

Explanation:

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 accelarated through a potential difference