Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field, then after sometime if the de-Broglie wavelengths of the two are λ₁ and λ₂, then select the possible option(s) :-
Select all that apply

Question

Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field, then after sometime if the de-Broglie wavelengths of the two are λ₁ and λ₂, then select the possible option(s) :-

Select all that apply

G1 Physics · Accepted Answer

Both electrons initially have the same momentum and hence the same de Broglie wavelength. A magnetic field changes only momentum direction, so the magnetic-field electron keeps the same |p|. An electric field can increase, decrease, or momentarily leave the other electron's |p| unchanged depending on direction and time. Therefore λ₁ can be equal to, greater than, or less than λ₂. Correct answer: A, B, C, D.

Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field, then after sometime if the de−Broglie wavelengths of the two are λ₁ and λ₂, then select the possible option(s) :-