contestada

An electron is moving through a magnetic field. If the velocity of the electron is doubled, the magnetic force experienced by the electron will
A. Stay the same
B. Double
C. Triple
D. Quadruple

Respuesta :

Answer:

B. Double

Explanation:

As we know that the magnetic force on moving electron is given as

[tex]F = q(\vec v \times \vec B)[/tex]

now we will have

[tex]F = qv B sin\theta[/tex]

here we know that the velocity of the electron is doubled and rest all components remains the same

so we will have

[tex]F' = q(2v)B sin\theta[/tex]

so the new force will be double that of initial force on the electron so correct answer will be

B. Double

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