d
(D) \({\text{u}}\,\, = \,\,{\text{1}}{{\text{0}}^{{\text{ - 4}}}}\,cm\,\,{\sec ^{ - 1}}\,\,\,\,\,\therefore \,\,\Delta u\,\, = \,\,\frac{{0.1 \times {{10}^{ - 4}}}}{{100}}\,\, = \,\,1 \times {10^{ - 7}}cm\,\,{\sec ^{ - 1}}\)

હવે \(\,\Delta u.\Delta x\,\,\, = \,\,\frac{h}{{4\pi m}}\,\,\,\,\,\,\therefore \,\,\Delta x = \frac{{6.625 \times {{10}^{ - 27}}}}{{4 \times 3.14 \times {{10}^{ - 11}} \times {{10}^{ - 7}}}}\,\, = \,\,5.27 \times {10^{ - 10}}cm\)