MHT CET 2023 Physics question
Electron of mass 'm' and charge 'q' is travelling with speed 'v' along a circular path of radius 'R', at right angles to a uniform magnetic field of intensity 'B'. If the speed of the electron is halved and the magnetic field is doubled, the resulting path would have radius
Answer: (D)
Solution
The magnetic force supplies the centripetal force: . New speed and new field : ,
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