KCET · Physics · Magnetic Effects of Current
An electron is moving with an initial velocity \( \vec{V}=V_{0} \hat{i} \) and is in a uniform magnetic field \( \vec{B}=B_{0} \hat{j} \). Then its de Broglie wavelength
- A decreases with time
- B remains constant
- C increase and decreases periodically
- D increases with time
Answer & Solution
Correct Answer
(B) remains constant
Step-by-step Solution
Detailed explanation
de-Broglie wavelength \( \lambda=\frac{h}{m v} \)
Electron is entering perpendicular to magnetic field. It moves in a circular path. But its speed remains same. Therefore de Broglie wavelength also remains constant.
Electron is entering perpendicular to magnetic field. It moves in a circular path. But its speed remains same. Therefore de Broglie wavelength also remains constant.
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