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Q.

A proton and an α-particle are accelerated through a potential difference of 100 V. The ratio of the wavelength associated with the proton to that associated with an α-particle is

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a

2:1

b

2 : 1

c

22:1

d

122

answer is C.

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Detailed Solution

λ=h2mQV⇒λ∞1mQ⇒λpλα=mαQαmpQp=4mp×2Qpmp×Qp=22.
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