Class 12

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Q1.

If the number of scattered alpha particles is $56$ at a scattering angle of ${90^o}$,then the number of scattered particles at a ${60^o}$ angle will be:

(A)

$224$

(B)

$256$

(C)

$98$

(D)

$108$

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Q2.

If in Rutherford's experiment,the number of particles scattered at $90^o$ angle are $28$ per min,then the number of scattered particles at an angle $60^o$ and $120^o$ will be:

(A)

$112/min, 12.5/min$

(B)

$100/min, 200/min$

(C)

$50/min, 12.5/min$

(D)

$117/min, 25/min$

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