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The specific charge of proton is 9.6 X 106 CKG-1 then for an α-particle it will be:
(1) 38.4X 10 7 Ckg-1
(2) 19.2x 10 7 Ckg-1
(3) 2.4 x 10 7 Ckg-1
(4) 4.8 x107 Ckg-1
Ans: 4.8 x107 Ckg-1
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