(A) The magnetic force on a charged particle is given by the formula $\vec{F} = q(\vec{v} \times \vec{B})$.For the force to be non-zero,the particle m

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The particle is moving and the magnetic field is perpendicular to the velocity.

(A) The magnetic force on a charged particle is given by the formula $\vec{F} = q(\vec{v} \times \vec{B})$.For the force to be non-zero,the particle must be moving (i.e.,velocity $\vec{v} \neq 0$) and the velocity must not be parallel to the magnetic field $\vec{B}$.If the particle is stationary,$\vec{v} = 0$,so $\vec{F} = 0$.If the velocity is parallel or anti-parallel to the magnetic field,the cross product $\vec{v} \times \vec{B} = 0$,so $\vec{F} = 0$.Therefore,for a magnetic force to exist,the particle must be moving,and the velocity vector must have a component perpendicular to the magnetic field vector.

Class 12 Physics Moving Charges and Magnetism Motion of Charged Particle In Magnetic Field

Medium

$A$ charged particle experiences a magnetic force in the presence of a magnetic field. Which of the following statements is correct?

KCET 2014 All KCET

A
The particle is moving and the magnetic field is perpendicular to the velocity.
B
The particle is moving and the magnetic field is parallel to the velocity.
C
The particle is stationary and the magnetic field is perpendicular.
D
The particle is stationary and the magnetic field is parallel.

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Moving Charges and Magnetism

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Motion of Charged Particle In Magnetic Field

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$A$ charged particle experiences a magnetic force in the presence of a magnetic field. Which of the following statements is correct?

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$A$ particle of charge $1.6 \ \mu C$ and mass $16 \ \mu g$ is present in a strong magnetic field of $6.28 \ T$. The particle is then fired perpendicular to the magnetic field. The time required for the particle to return to its original location for the first time is . . . . . . $s$. $(\pi = 3.14)$

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