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A uniform magnetic field is in the positive z direction. A positively charged particle is moving in the positive x direction through the field. The net force on the particle can be made zero by applying an electric field in what direction? A. Positive y B. Negative y C. Positive x D. Negative x E. Positive z

Respuesta :

Answer:

B) Negative Y direction

Explanation:

Direction of magnetic field is along +z direction

charge = + q

direction of motion of charge = + x direction

now we will have

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

so we will have

[tex]F = +q(v \hat i \times v \hat k)[/tex]

[tex]F = (qvB)(-\hat j)[/tex]

so force will be acting towards - Y direction

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