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A particle A of mass 'm' and charge 'q' is accelerated by a potential difference of 50 V. Another particle B of mass ' 4 m' and charge 'q' is accelerated by a potential difference of 2500 V. The ratio of de-Broglie wavelengths B A λ λ is close to :

1. 4.47
2. 10.00
3. 14.14
4. 0.07

Correct answer: 14.14

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