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For an electron if the uncertainty in velocity is Δ v , the uncertainty in its position( Δ x ) is given by:
(1) hm/ 4 Π Δ b
(2) 4 Π / hm Π v
(3) h/ 4 Π Π b
(4) 4 Π m / h Δ v
ans: h/ 4 Π Δ b
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