1.

A charge particle of charge 'q' and mass 'm' enters in a given magnetic field 'B' and perpendicular to the magnetic field as shown in the figure. It enters at an angle of 60^(@) with the boundary surface of magnetic field and comes out at an angle of 30^(@)with the boundary surface of the magnetic field as shown in the figure. Find width 'd' in which magnetic field exist.

Answer»

`((sqrt3-1)MV)/(4qB)`
`((sqrt3-1)mv)/(QB)`
`((sqrt3-1)mv)/(3qB)`
`((sqrt3-1)mv)/(2qB)`

ANSWER :d


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