# Recent questions and answers in JEEMAIN PAST PAPERS

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### Uncertainty in the position of an electron (mass $9.1 \times 10^{-31} kg$) moving with a velocity $300\; ms^{-1}$, accurate upon $0.001 \%$ will be : <br> ($h = 6.63 \times 10^{-34} Js$)

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