If uncertainity in position and momentum are equal, the uncertainty in velocity is:

(A) $\sqrt{h/2\mathrm{\pi }}$

(B) $\frac{1}{2m}\sqrt{h/\mathrm{\pi }}$

(C) $\sqrt{h/\mathrm{\pi }}$

(D) None

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Heisenberg Uncertainity Principle

(B) $∆$x.m$∆$V = h/4$\mathrm{\pi }$  or (m$∆$V)2 = h/4$\mathrm{\pi }$

m$∆$V=$\sqrt{h/4\mathrm{\pi }}$ or $∆$V = $\sqrt{h/4{\mathrm{\pi m}}^{2}}$ = 1/2m$\sqrt{h/\mathrm{\pi }}$

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