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Two protons are having same kinetic ene...

Two protons are having same kinetic energy. One proton enters a uniform magnetic field at right angles ot it. Second proton enters a uniform electric field in the direction of field. After some time their de Broglie wavelengths are `lambda_1 and lambda_2` then
(a) `lambda_1 = lambda_2`
(b) `lambda_1 lt lambda_2`
(c) `lambda_1 gt lambda_2`
(d) some more information is required

Text Solution

Verified by Experts

The correct Answer is:
D
We have work is done by only electric field. Thus if `bar(E)||vec(v),|vec(v)|` decreases, & thus momentum of electron decreases & vice-versa, while in magnetic field `|vec(v)|` remains constant.
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