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Q.

An electron is moving with an initial velocity V=V0i^  and is in a magnetic field B=B0j^. Then, its de Broglie wavelength

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a

renains constant

b

increases with time

c

decreases with time

d

first increases then decreases

answer is A.

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Detailed Solution

The magnetic field cannot change speed of the particle. Hence, de Broglie wavelength remains unchanged.
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