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- Need explanation for: 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, then
- #Birla Institute of Technology & Science Admission Test
- #Physics
- #Magnetic Effect of Current
- #Engineering
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, then
- Option 1)
Positive ions deflect towards +y direction and negative ions towards -y direction
- Option 2)
All ions deflect towards +y direction
- Option 3)
All ions deflect towards -y direction
- Option 4)
Positive ions deflect towards -y direction and negative ions towards +y direction
Answers (1)
As we learnt in
Force on a current carrying conductor -
- wherein
idl=current element
Due to electric field positive ion will move along +x direction and -ve ion along -x direction.
Since magnetic field is along +z direction, it will apply force in -y direction for both positive and negative ion.
Option 1)
Positive ions deflect towards +y direction and negative ions towards -y direction
incorrect
Option 2)
All ions deflect towards +y direction
incorrect
Option 3)
All ions deflect towards -y direction
correct
Option 4)
Positive ions deflect towards -y direction and negative ions towards +y direction
incorrect
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