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From rest an electron is accelerated bet...

From rest an electron is accelerated between two such points which has poteintial 20 `&` 40 volts respectively. Associated de-Broglie wavelength of electron is-

A

7.5 Å

B

2.75 Å

C

2.75 m

D

0.75 Å

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda =12.27/sqrt(v)=12.27/sqrt(20)=2.75 Å`.
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