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KCET2019PhysicsMagnetic Effects of Current

An electron is moving with an initial velocity ( V =V₀ i ) and is in a uniform magnetic field ( B =B₀ j ). Then its de Broglie wavelength

Options

  1. Adecreases with time
  2. Bremains constant
  3. Cincrease and decreases periodically
  4. Dincreases with time

Correct answer

B. remains constant

Step-by-step solution

(B) de-Broglie wavelength ( = 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.

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