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An ionized gas contains both positive and negative ions. If it is subjected simultaneously to an electric field along the +x direction and a magnetic field along the +z direction, thenA) Positive ions deflect towards +y direction and negative ions towards -y directionB) All ions deflect towards +y directionC) All ions deflect towards -y directionD) Positive ions deflect towards -y direction and negative ions towards +y direction

Answer»

Correct Answer: C) All ions deflect towards -y direction

Exaplanation :

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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