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For a positively charged particle moving in a x-y plane initially along the x-axis, there is a sudden change in its path due to the presence of electric and/or magnetic fields beyond P. The curved path is shown in the x-y plane and is found to be non-circular.Which one of the following combinations is possible?(a) E = 0; B =bi + ck (b) E = ai; B =ck + ai (c) E = 0; B =cj + bk(d) E = ai; B =ck + bj |
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Answer» As the curved path is confined to the XY plane, the component of magnetic field effective in deflecting the particle is the Z-component only. The other component should be the X-component since the X-component cannot deflect the charged particle proceeding along the X-direction. There has to be an electric field since the path of the particle is non-circular. All these conditions are satisfied by option (b). |
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