The magnetic force experienced by a charged particle moving in a magnetic field will beminimum when it moves
Correct answer: C. Parallel to the field.
- A. At an angle of 30⁰.
- B. At an angle of 45⁰.
- C. Parallel to the field.
- D. Perpendicular to the field.
Explanation
The magnetic force experienced by a charged particle moving in a magnetic field is determined by the equation F = qvBsinθ, where θ is the angle between the velocity vector and the magnetic field. The force is at its minimum, specifically zero, when the particle moves parallel (or anti-parallel) to the magnetic field because sin(0°) = 0. Therefore, option C is correct. Other angles, such as 30° or 45°, result in non-zero forces because the sine of these angles is not zero. When the particle moves perpendicular to the field (90°), the force is maximized because sin(90°) = 1.
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About Charged Particle in a Magnetic Field
A charged particle moving through a magnetic field experiences the Lorentz force, which is perpendicular to both its velocity and the field. The motion may be circular or helical, with questions involving radius, angular frequency, time period, and work done. A stationary charge feels no magnetic force.
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