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When an electron is accelerated by 20 kV, its de-Broglie wavelength is λ0.

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When an electron is accelerated by 20 kV, its de-Broglie wavelength is λ0. If the electron is accelerated by 40 kV, find its de-Broglie wavelength

(1) λ0/2

(2) √(2λ0)

(3) λ0/√2

(4) √0

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Correct option is (3) λ0/√2

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