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In a certain region of space there exists a constant and uniform magnetic field of induction B. The width of the magnetic field is a. A charged particle having charge q is projected perpendicular to B and along the width the field. If deflection produced by the fiel perpendicular to the width is d, then the magnitud of the momentum of the particle is,

A

`((d^(2)+a^(2)))/(2d)qB`

B

`(a^(2))/(2d^(2))qB`

C

`(4d^(2))/((a+d))qB`

D

`((a^(2)-d^(2)))/(2d)qB`

Text Solution

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The correct Answer is:
a
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