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An alpha - particle moves in a circular ...

An `alpha` - particle moves in a circular path of radius 0.83cm in the presence of a magnetic field of `0.25Wb//m^2` .The de-broglie wavelength associated with the particle will be:

A

`0.1overset@A`

B

`10overset@A`

C

`0.01overset@A`

D

`1overset@A`

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