An \( \alpha \)-particle moves in a circular path of radius \( 0.83 \mathrm{~cm} \) in the prese...

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An \( \alpha \)-particle moves in a circular path of radius \( 0.83 \mathrm{~cm} \) in the presence of a magnetic field of \( 0.25 \mathrm{~Wb} / \mathrm{m}^{2} \). The de-Broglie wavelength associated with the particle will be:
a. \( 1 \mathrm{~A} \)
b. \( 0.1 \mathrm{~A} \)
c. \( 10 \mathrm{~A} \)
d. \( 0.01 \mathrm{~A} \)
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