If a charged particle kept at rest experiences an electromagnetic force:
Correct answer: A. The electric field must not be zero.
- A. The electric field must not be zero.
- B. The magnetic field must not be zero.
- C. The electric field must be zero.
- D. The magnetic field alone can exert a force on the particle.
- E. Option A and D are correct.
Explanation
The correct answers are A) and D).Electromagnetic force on a charged particle is due to both electric and magnetic fields. However, magnetic force acts only on moving charges. A stationary charged particle can experience a force only due to an electric field, which means the electric field must not be zero. The magnetic field, however, may or may not be zero as it does not affect a particle that is at rest.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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