A magnetic field exerts a force on a charged particle:
Correct answer: C. If the particle is moving across the field lines
- A. Always
- B. Never
- C. If the particle is moving across the field lines
- D. If the particle is moving along the field lines
Explanation
The magnetic field exerts a force on the particle in a particular condition. When the charged particle is moving in the same direction as the magnetic field, then the force is zero. The magnetic field exerts a force on a charged particle if it is moving across the magnetic lines of force.If the particle is moving across the field lines, it means that it makes some angle with magnetic field lines. So, F = qvbsin(theta) is not equal to 0
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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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