An electron enters with a velocity v = v0i into a cubical region (face parallel to coordinate planes) in which there are uniform electric and magnetic fields. The orbit of the electron is found to spiral down inside the cube in a plane parallel to the x-y plane. Suggest a configuration to fields E and B that can lead to it.
An electron enters with a velocity v = v0i into a cubical region (face parallel to coordinate planes) in which there are uniform electric and magnetic fields. The orbit of the electron is found to spiral down inside the cube in a plane parallel to the x-y plane. Suggest a configuration to fields E and B that can lead to it.
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1 Answer
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This is a Short Answer Type Questions as classified in NCERT Exemplar
Explanation- considering magnetic field along B=Bk and electron enters with a velocity v=vi into a cubical region
The force on electron using Lorentz force = -e (vi Bk)= evBi
So the force F= -eE0 k accelerates along z axis which in turn increases the radius of circular path and hence particle transversed on spiral path.
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