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An electron is moving with an initial ve...

An electron is moving with an initial velocity `vecv=v_(0)hati` and is in a magnetic field `vecB=vecB_(0)hatj`. Then its de-Broglie wavelength

A

remains constant

B

increases with time

C

decreases with time

D

increases and decreases periodically.

Text Solution

Verified by Experts

The correct Answer is:
A
Under the influence of magnetic field only the direction of motion of electron changes but magnitude of velocity remains unchanged at `v_(0)`. Hence, its de-Broglie wavelength `lamda=(h)/(mv_(0))` remains unchanged/constant.
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