If \( \Delta x \) is uncertainty in the specification of position a...

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If \( \Delta x \) is uncertainty in the specification of position and \( \Delta p \) is the uncertainty in specification of momentum of an electron, then the product - \( \Delta x \) and \( \Delta p \) is of the order of \( \hbar \) such that \( \hbar \)
(a) \( h / 2 \pi \)
(b) \( 10^{-2} \)
(c) \( 10^{-19} \)
(d) \( 10^{-31} \)
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