A) Positive ions deflect towards +y direction and negative ions towards ?y direction
B) All ions deflect towards +y direction
C) All ions deflect towards ?y direction
D) Positive ions deflect towards ?y direction and negative ions towards +y direction
Correct Answer: C
Solution :
As the electric field is switched on, positive ion will start to move along positive x-direction and negative ion along negative x-direction. Current associated with motion of both types of ions is along positive x-direction. According to Fleming's left hand rule force on both types of ions will be along negative y-direction.
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