एक त्वरित इलेक्ट्रॉन की स्पीड \(0.02 \%\) अनिश्चितता के साथ \(5 \times 10^{6}\, ms ^{-1}\) है। गतिमान अवस्था में इसकी स्थिति ज्ञात करने में अनिश्चितता \(x \times 10^{-9}\, m\) है। \(x\) का मान ...................है। (निकटतम पूर्णांक में) [उपयोग कीजिए इलेक्ट्रॉन की संहति \(\left.=9.1 \times 10^{-31} \,kg ,\,\, h =6.63 \times 10^{-34} \,Js , \pi=3.14\right]\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.