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An αparticle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m2.The de-Broglie wavelength associated with the particle will be 

(a) 1 A0                                                   (b) 0.1 A0

(c) 10 A0                                                 (d) 0.01 A0

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