Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

An electron is moving with an initial velocity v = vo j and is in a magnetic field B = Bo j. Then, its de-Broglie wavelength : 

Options:

remains constant

increases with time

decreases with time

increases and decreases periodically

Correct Answer:

remains constant

Explanation:

Use : F = q(v x B)

F is constant ∴ magnitude of momentum is constant ⇒ \(\lambda\) → constant