એક કણ કે જેનો વિદ્યુતભાર \(3 \times 10^{-19} C\) અને દળ \(6 \times 10^{-27} kg\) છે, તે 1.21 V ના વિદ્યુત સ્થિતિમાનનો ઉપયોગ કરીને પ્રવેગિત થાય છે. કણ સાથે સંકળાયેલ દ્રવ્ય તરંગની તરંગલંબાઈ \(\alpha \times 10^{-12} m\) છે. \(\alpha\) નું મૂલ્ય _________ છે.
(પ્લાન્કનો અચળાંક \(=6.6 \times 10^{-34} J . s\) લો.)

A 5
B 15
C 10
D 20

Verified Solution

Answer & Solution

Correct Answer

(C) 10

Step-by-step Solution

Detailed explanation

\( \lambda=\frac{h}{\sqrt{2mqV}} \) \( \lambda=\frac{6.6\times10^{-34}}{\sqrt{2\times18\times10^{-46}\times1.21}} \) \( \lambda=10^{-11}m=10\times10^{-12}m \) \( \alpha=10 \)

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.

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