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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

`0.75 overset(@)A`

B

`7.5 overset(@)A`

C

`2.75 overset(@)A`

D

`2.75m`

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