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Physics Magnetic Field Question!!

Hi, please could somebody help me with this question!

In a demonstration, electrons are going round in a 12cm diameter helix with the beam at 70° to the 0.0032T magnetic field. Calculate the speed of the electron.
Reply 1
The force on the electron is equal to the centripetal force then you just rearrange
Reply 2
Original post by emdoesalevels
Hi, please could somebody help me with this question!

In a demonstration, electrons are going round in a 12cm diameter helix with the beam at 70° to the 0.0032T magnetic field. Calculate the speed of the electron.


Could u post a diagram.

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